Sandstone Rockhouses of the Eastern United States, with Particular Reference to the Ecology and Evolution of the Endemic Plant Taxa

Botanical Review

Volumn 62, Issue 4, 1996, Pages 311-362

  Walck, Jeffrey L ^a   Baskin, Jerry M ^a   Baskin, Carol C ^a   Francis, S Wilson ^b  

^a UNIVERSITY OF KENTUCKY   (United States)

^b Natural Bridge State Resort Park   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

FILICOPHYTA; MAGNOLIOPHYTA;

SPECIES COMPOSITION;

EID: 0030318478     PISSN: 00068101     EISSN: None     Source Type: Journal    
DOI: 10.1007/BF02856616     Document Type: Article

References (280)

1. Adovasio, J. M., J. Donahue, R. C. Carlisle, K. Cushman, R. Stuckenrath & P. Wiegman. 1984. Meadowcroft Rocksheiter and the Pleistocene/Holocene transition in southwestern Pennsylvania. Pages 347-369 in H. H. Genoways & M. R. Dawson (eds.), Contributions in Quaternary vertebrate paleontology: A volume in memorial to John E. Guilday. Carnegie Mus. Nat. Hist. Special Publ. No. 8.
2. -, J. D. Gunn, J. Donahue & R. Stuckenrath. 1977. Meadowcroft Rocksheiter: Retrospect 1976. Pennsylvania Archaeol. 47: 1-93.
3. Anderson, S. 1994. Area and endemism. Quart. Rev. Biol. 69: 451-471.
4. Andreasen, M. L. & W. H. Eshbaugh. 1973. Solidago albopilosa Braun, a little known goldenrod from Kentucky. Castanea 38: 117-132.
5. Antonovics, J., D. Stratton, P. H. Thrall & A. M. Jarosz. 1996. An anther-smut disease (Ustilago violacea) of fire-pink (Silene virginica): Its biology and relationship to the anther-smut disease of white campion (Silene alba). Amer. Midl. Naturalist 135: 130-143.
6. Atherton, E. & J. E. Palmer. 1979. The Mississippian and Pennsylvanian (Carboniferous) Systems in the United States-Illinois. U.S. Geol. Surv. Profess. Pap. 1110-L.
7. Austin, D. F. 1975. Bird flowers in the eastern United States. Florida Sci. 38: 1-12.
8. Baker, V. R. 1990. Spring sapping and valley network development, with case studies by R. C. Kochel, V. R. Baker, J. E. Laity & A. D. Howard. Pages 235-265 in C. G. Higgins & D. R. Coates (eds.), Groundwater geomorphology; The role of subsurface water in Earth-surface processes and landforms. Geol. Soc. Amer. Special Pap. 252.
9. Barbour, M. G., J. H. Burk & W. D. Pitts. 1987. Terrestrial plant ecology. Ed. 2. Benjamin/Cummings, Menlo Park, California.
10. Barr, T. C., Jr. 1961. Caves of Tennessee. Tennessee Div. Geol. Bull. 64.
11. Bartlett, C. S., Jr. 1963. The Tom's Brook Site-3J01, A preliminary report. Pages 15-65 in C. R. McGimsey III (ed.), Arkansas archeology 1962. Arkansas Archeol. Soc., Fayetteville.
12. Baskin, C. C. & J. M. Baskin. 1988. Germination ecophysiology of herbaceous plant species in a temperate region. Amer. J. Bot. 75: 286-305.
13. Baskin, J. M. & C. C. Baskin. 1985. The annual dormancy cycle in buried weed seeds: A continuum. BioScience 35: 492-498.
14. Bates, R. L. & J. A. Jackson (eds.). 1980. Glossary of geology. Ed. 2. American Geological Institute, Falls Church, Virginia.
15. Beamish, K. I. 1955. Studies in the genus Dodecatheon of northwestern America. Bull. Torrey Bot. Club 82: 357-366.
16. Beatley, J. C. 1956. The winter-green herbaceous flowering plants of Ohio. Ohio J. Sci. 56: 349-377.
17. Beaudry, J. R. 1959. Solidago albopilosa Braun and S. flexicaulis L. Castanea 24: 53-54.
18. _. 1963. Studies on Solidago L. VI. Additional chromosome numbers of taxa of the genus Solidago. Canad. J. Genet. Cytol. 5: 150-174.
19. Berg, T. M., M. K. McInerney, J. H. Way & D. B. MacLachlan. 1983. Stratigraphic correlation chart of Pennsylvania. Pennsylvania Bur. Topogr. Geol. Surv. Gen. Geol. Rep. 75.
20. Beveridge, T. R. 1990. Geologic wonders and curiosities of Missouri. Ed. 2. Revised by J. D. Vineyard. Missouri Div. Geol. Land Surv. Educ. Ser. No. 4.
21. Bicker, A. R., Jr. 1979. The Mississippian and Pennsylvanian (Carboniferous) Systems in the United States - Alabama and Mississippi. Carboniferous outcrops of Mississippi. U.S. Geol. Surv. Profess. Pap. 1110-I.
22. Björkman, O. 1981. Responses to different quantum flux densities. Pages 57-107 in O. L. Lange, P. S. Nobel, C. B. Osmond & H. Ziegler (eds.), Physiological plant ecology I: Responses to the physical environment. Encyclopedia of plant physiology. New series, vol. 12A. Springer-Verlag, Berlin.
23. Blackburn, K. B. 1928. Chromosome number in Silene and the neighbouring genera. Pages 439-446 in Proc. Fifth Int. Congr. Genetics.
24. Boivin, B. 1944. American Thalictra and their old world allies. Rhodora 46: 337-377, 391-445, 453-487.
25. Bramwell, D. 1972. Endemism in the flora of the Canary Islands. Pages 141-159 in D. H. Valentine (ed.), Taxonomy phytogeography and evolution. Academic Press, London.
26. Braun, E. L. 1935. The vegetation of Pine Mountain, Kentucky. Amer. Midl. Naturalist 16: 517-565.
27. _. 1940. New plants from Kentucky. Rhodora 42: 47-51.
28. _. 1942. A new species and a new variety of Solidago from Kentucky. Rhodora 44: 1-4.
29. _. 1950. Deciduous forests of eastern North America. Blakiston, Philadelphia.
30. Bryant, W. S., W. C. McComb & J. S. Fralish. 1993. Oak-hickory forests (western mesophytic/oakhickory forests). Pages 143-201 in W. H. Martin, S. G. Boyce & A. C. Echternacht (eds.), Biodiversity of the southeastern United States: Upland terrestrial communities. John Wiley, New York.
31. Bush, W. V., B. R. Haley, C. G. Stone, D. F. Holbrook & J. D. McFarland III. 1977. A guidebook to the geology of the Arkansas Paleozoic area. Arkansas Geological Commission, Little Rock.
32. Butler, B. M. 1971. Hoover-Beeson Rocksheiter, 40Cn4, Cannon County, Tennessee. Tennessee Archaeol. Soc. Misc. Pap. No. 9.
33. Cain, S. A. & G. M. de Oliveira Castro. 1959. Manual of vegetation analysis. Harper and Brothers, New York.
34. Camburn, K. E. 1982. Subaerial diatom communities in eastern Kentucky. Trans. Amer. Microscop. Soc. 101: 375-387.
35. Campbell, J. J. N. & W. Meijer. 1989. The flora and vegetation of Jessamine Gorge, Jessamine County, Kentucky: A remarkable concentration of rare species in the Bluegrass Region. Trans. Kentucky Acad. Sci. 50: 27-45.
36. _, J. R. Abbott, R. R. Cicerello, J. D. Kiser, J. R. MacGregor & J. G. Palis. 1994. Cooperative inventory of endangered, threatened, sensitive and rare species, Daniel Boone National Forest, London Ranger District. Kentucky State Nature Preserves Commission, Frankfort.
37. _, S. A. Bonney, J. D. Kiser, L. E. Kornman, J. R. MacGregor, L. E. Meade & A. C. Risk. 1992. Cooperative inventory of endangered, threatened, sensitive and rare species, Daniel Boone National Forest, Morehead Ranger District. Kentucky State Nature Preserves Commission, Frankfort.
38. _, J. E. Flotemersch, J. R. MacGregor, D. Noe, A. C. Risk, M. D. Studer & D. T. Towles. 1991. Cooperative inventory of endangered, threatened, sensitive and rare species, Daniel Boone National Forest, Berea Ranger District. Kentucky State Nature Preserves Commission, Frankfort.
39. _, A. C. Risk, V. L. Andrews, B. Palmer-Ball, Jr. & J. R. MacGregor. 1990. Cooperative inventory of endangered, threatened, sensitive and rare species, Daniel Boone National Forest, Stearns Ranger District. Kentucky State Nature Preserves Commission, Frankfort.
40. _, D. T. Towles, J. R. MacGregor, R. R. Cicerello, B. Palmer-Ball, Jr., M. E. Medley & S. Olson. 1989. Cooperative inventory of endangered, threatened, sensitive and rare species, Daniel Boone National Forest, Stanton Ranger District. Kentucky State Nature Preserves Commission, Frankfort.
41. Caplenor, D. 1955. An annotated list of the vascular plants of the gorges of the Fall Creek Falls State Park. J. Tennessee Acad. Sci. 30: 93-108.
42. Carman, J. E. 1946. The geologic interpretation of scenic features in Ohio. Ohio J. Sci. 46: 241-283.
43. Carter, J. P. & C. E. Martin. 1994. The occurrence of crassulacean acid metabolism among epiphytes in a high-rainfall region of Costa Rica. Selbyana 15: 104-106.
44. Chesnut, D. R., Jr. 1992. Stratigraphic and structural framework of Carboniferous rocks in the central Appalachian Basin in Kentucky. Kentucky Geol. Surv. Ser. 11, Bull. 3.
45. Childress, J. D. 1992. Soil survey of Bell and Harlan Counties, Kentucky. U.S.D.A. Soil Conservation Service & U.S.D.A. Forest Service, in cooperation with the Kentucky Agric. Exp. Sta. & Kentucky Nat. Resources Environ. Protect. Cab.
46. Clark, M. B. 1962. Trichomanes boschianum in Madison County, Arkansas. Amer. Fern J. 52: 85-86.
47. Clewell, A. F. & J. W. Wooten. 1971. A revision of Ageratina (Compositae: Eupatorieae) from eastern North America. Brittonia 23: 123-143.
48. Coates, F. & J. B. Kirkpatrick. 1992. Environmental relations and ecological responses of some higher plant species on rock cliffs in northern Tasmania. Austral. J. Ecol. 17: 441-449.
49. Coker, W. C. 1938. A filmy fern from North Carolina. J. Elisha Mitchell Sci. Soc. 54: 349-350 + plates 40-41.
50. Collins, H. R. 1979. The Mississippian and Pennsylvanian (Carboniferous) Systems in the United States-Ohio. U.S. Geol. Surv. Profess. Pap. 1110-E.
51. Copeland, E. B. 1938. Genera Hymenophyllacearum. Philipp. J. Sci. 67: 1-110.
52. Corgan, J. X. & J. T. Parks. 1979. Natural bridges of Tennessee. Tennessee Div. Geol. Bull. 80.
53. Cowan, C. W. 1979. Prehistoric plant utilization at the Rogers Rocksheiter, Powell County, Kentucky. M.A. thesis, University of Kentucky, Lexington.
54. _, H. E. Jackson, K. Moore, A. Nickelhoff & T. L. Smart. 1981. The Cloudsplitter Rockshelter, Menifee County, Kentucky: A preliminary report. Southeastern Archaeol. Conf. Bull. 24: 60-76.
55. Coy, F. E., Jr. & T. C. Fuller. 1971. Petroglyphs of Powell County, Kentucky. Central States Archaeol. J. 18: 112-122.
56. Cranfill, R. 1980. Ferns and fern allies of Kentucky. Kentucky Nature Preserves Commission Sci. Techn. Ser. No. 1.
57. _. 1991. Flora of Hardin County, Kentucky. Castanea 56: 228-267.
58. _ & M. E. Medley. 1981. Notes on the flora of Kentucky: New and interesting plants in Kentucky. Rhodora 83: 125-131.
59. Crawford, L. C. 1951. A new fern for the United States. Amer. Fern J. 41: 15-20.
60. Cumings, E. R. 1922. Nomenclature and description of the geological formations of Indiana. Pages 403-570 in W. N. Logan, E. R. Cumings, C. A. Malott, S. S. Visher, W. M. Tucker & J. R. Reeves (eds.), Handbook of Indiana geology. Indiana Department of Conservation Publ. No. 21.
61. Curtis, J. D. & N. R. Lersten. 1986. Development of bicellular foliar secretory cavities in white snakeroot, Eupatorium rugosum (Asteraceae). Amer. J. Bot. 73: 79-86.
62. Cusick, A. W. 1983. Vittaria gametophytes discovered in a new physiographic province. Amer. Fern J. 73: 33-38.
63. _. 1994. Noteworthy collections - West Virginia. Castanea 59: 79-80.
64. Darling, T., Jr. 1955. A red-letter day in South Carolina. Amer. Fern J. 45: 138-142.
65. Daubenmire, R. F. 1974. Plants and environment: A textbook of plant autecology. Ed. 3. John Wiley, New York.
66. Dean, B. E. 1964. Ferns of Alabama and fern allies. American Southern Publications, Northport, Alabama.
67. DeLong, R. M. 1967. Bedrock geology of the south Bloomingville quadrangle, Hocking and Vinton Counties, Ohio. Ohio Div. Geol. Surv. Rep. Invest. No. 63.
68. Donahue, J. & J. M. Adovasio. 1990. Evolution of sandstone rockshelters in eastern North America; a geoarchaeological perspective. Pages 231-251 in N. P. Lasca & J. Donahue (eds.), Archaeological geology of North America. Geol. Soc. Amer. Centennial Special Vol. 4.
69. Duncan, W. H. & J. T. Kartesz. 1981. Vascular flora of Georgia, an annotated checklist. University of Georgia Press, Athens.
70. Eaton, S. W. & E. F. Schrot. 1987. A flora of the vascular plants of Cattaraugus County, New York. Buffalo Soc. Nat. Sci. Bull. 31.
71. England, K. J., H. L. Smith, L. D. Harris & J. G. Stephens. 1961. Geology of the Ewing quadrangle, Kentucky and Virginia. U.S. Geol. Surv. Map GQ-172.
72. Ennis, B. 1928. The life forms of Connecticut plants and their significance in relation to climate. Connecticut Geol. Nat. Hist. Surv. Div. Biol. Bull. No. 43.
73. Evers, R. A. 1961. The filmy fern in Illinois. Illinois Nat. Hist. Surv. Notes No. 44.
74. Farrar, D. R. 1971. The biology of ferns with asexually reproducing gametophytes in the eastern United States. Ph.D. diss., University of Michigan, Ann Arbor.
75. _. 1978. Problems in the identity and origin of the Appalachian Vittaria gametophyte, a sporophyteless fern of the eastern United States. Amer. J. Bot. 65: 1-12.
76. _. 1985. Independent fern gametophytes in the wild. Proc. Roy. Soc. Edinburgh 86B: 361-369.
77. _. 1990. Species and evolution in asexually reproducing independent fern gametophytes. Syst. Bot. 15: 98-111.
78. _. 1992. Trichomanes intricatum: The independent Trichomanes gametophyte in the eastern United States. Amer. Fern J. 82: 68-74.
79. _. 1993a. Hymenophyllaceae Link - filmy fern family. Pages 190-197 in N. R. Morin et al. (eds.), Flora of North America north of Mexico. Vol. 2. Oxford University Press, New York.
80. _. 1993b. Vittariaceae Ching - shoestring fern family. Pages 187-189 in N. R. Morin et al. (eds.), Flora of North America north of Mexico. Vol. 2. Oxford University Press, New York.
81. _ & P. G. Davison. 1994. Hymenophyllum tayloriae: Sporophyte and gametophyte together again after 58 years. Amer. J. Bot. 81, Suppl. to No. 6: 128 (abstract).
82. _ & J. T. Mickel. 1991. Vittaria appalachiana: A name for the "Appalachian gametophyte." Amer. Fern J. 81: 69-75.
83. _, J. C. Parks & B. W. McAlpin. 1983. The fern genera Vittaria and Trichomanes in the northeastern United States. Rhodora 85: 83-92.
84. Fassett, N. C. 1944. Dodecatheon in eastern North America. Amer. Midl. Naturalist 31: 455-486.
85. Favarger, C. & J. Contandriopoulos. 1961. Essai sur l'endémisme. Ber. Schweiz. Bot. Ges. 71: 384-408.
86. Fenneman, N. M. 1938. Physiography of eastern United States. McGraw-Hill, New York.
87. Fenster, C. B., C. L. Hassler & M. R. Dudash. 1996. Fluorescent dye particles are good pollen analogs for hummingbird-pollinated Silene virginica (Caryophyllaceae). Canad. J. Bot. 74: 189-193.
88. Ferguson, T. A. & J. W. Gardner. 1986. Results of field investigations. Pages 74-268 & G1-G42 in T. A. Ferguson, R. A. Pace, J. W. Gardner & R. W. Hoffman (eds.), An archaeological reconnaissance and testing of indirect impact areas within selected development sites of the Big South Fork National River and Recreation Area. Final report submitted to U.S. Army Corps of Engineers, Nashville District, Nashville, Tennessee.
89. _, R. A. Pace, J. W. Gardner & R. W. Hoffman (eds.). 1986. An archaeological reconnaissance and testing of indirect impact areas within selected development sites of the Big South Fork National River and Recreation Area. Final report submitted to U.S. Army Corps of Engineers, Nashville District, Nashville, Tennessee.
90. Fernald, M. L. 1942. The seventh century of additions to the flora of Virginia. Rhodora 44: 341-405, 416-452, 457-479 + plates 717-744.
91. _. 1950. Gray's manual of botany. Ed. 8. American Book Co., New York.
92. Froelich, A. J. & J. F. Tazelaar. 1974. Geologic map of the Pineville quadrangle, Bell and Knox Counties, Kentucky. U.S. Geol. Surv. Map GQ-1129.
93. Funkhouser, W. D. 1925. Wild life in Kentucky. Kentucky Geol. Surv. Ser. 6, Vol. 16.
94. _ & W. S. Webb. 1928. Ancient life in Kentucky. Kentucky Geol. Surv. Ser. 6, Vol. 34.
95. _ & _. 1929. The so-called "Ash Caves" in Lee County, Kentucky. Univ. Kentucky Rep. Archaeol. Anthrop. 1: 37-112.
96. _ & _. 1930. Rock shelters of Wolfe and Powell Counties, Kentucky. Univ. Kentucky Rep. Archaeol. Anthrop. 1: 239-306.
97. Furr, R. S. 1971. A biosystematic study of the subsections Villosae and Micranthae of the genus Heuchera from the southeastern United States. Ph.D. diss., University of Tennessee, Knoxville.
98. Gardner, J. W. 1986. Historic site and feature descriptions. Pages C1-C40 in T. A. Ferguson, R. A. Pace, J. W. Gardner & R. W. Hoffman (eds.), An archaeological reconnaissance and testing of indirect impact areas within selected development sites of the Big South Fork National River and Recreation Area. Final report submitted to U.S. Army Corps of Engineers, Nashville District, Nashville, Tennessee.
99. Gastony, G. J. 1977. Chromosomes of the independently reproducing Appalachian gametophyte: A new source of taxonomic evidence. Syst. Bot. 2: 43-48.
100. Gibson, D. 1961. Life-forms of Kentucky flowering plants. Amer. Midl. Naturalist 66: 1-60.
101. Gilbert, F. A. 1938. Notes on plants from southern West Virginia III. Castanea 3: 81-84.
102. Gillespie, J. P. 1956. The genus Heuchera in Tennessee. J. Tennessee Acad. Sci. 31: 232-241.
103. Gleason, H. A. & A. Cronquist. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. Ed. 2. The New York Botanical Garden, Bronx.
104. Gould, K. S., D. N. Kuhn, D. W. Lee & S. F. Oberbauer. 1995. Why leaves are sometimes red. Nature 378: 241-242.
105. Graham, A. 1993. History of the vegetation: Cretaceous (Maastrichtian) - Tertiary. Pages 57-70 in N. R. Morin et al. (eds.), Flora of North America north of Mexico. Vol. 1. Oxford University Press, New York.
106. Grant, W. F. 1953. A cytotaxonomic study in the genus Eupatorium. Amer. J. Bot. 40: 729-742.
107. Griggs, R. F. 1914. A botanical survey of the Sugar Grove region. Ohio Biol. Surv. Bull. 3.
108. Gunn, S. C. 1991. An update on the status of Thelypteris pilosa var. alabamensis. Report submitted to U.S. Fish and Wildlife Service, Jackson, Mississippi.
109. Haley, B. R., E. E. Glick, W. M. Caplan, D. F. Holbrook & C. G. Stone. 1979. The Mississippian and Pennsylvanian (Carboniferous) Systems in the United States - Arkansas. U.S. Geol. Surv. Profess. Pap. 1110-O.
110. Hall, J. F. 1953. The geology of Hocking State Park. Ohio Div. Geol. Surv. Inform. Circ. No. 8.
111. Hammond, H. D. 1992. Corrections and additions for and errors found in the Manual of vascular plants of northeastern United States and adjacent Canada, second edition, by Henry A. Gleason (late) and Arthur Cronquist. Bull. Torrey Bot. Club 119: 88-89.
112. Hansen, C. E. 1952. The life-forms of the flowering plants of Illinois. M.S. thesis, Northwestern University, Evanston, Illinois.
113. Harker, D. F., Jr., M. E. Medley, L. R. Phillippe, R. R. Hannan & A. Phillippi. 1981. Rare plants of eastern Kentucky and the Daniel Boone National Forest. Kentucky Nature Preserves Commission, Frankfort.
114. Hayes, W. C. & R. D. Knight. 1961. Cambrian System. Pages 14-20 in J. W. Koenig (ed.), The stratigraphic succession in Missouri. Missouri Div. Geol. Surv. Water Resources Ser. 2, Vol. 40.
115. Heaslip, M. B. 1948. Autecological studies of Silene rotundifolia Nutt. M.S. thesis, Ohio State University, Columbus.
116. _. 1950. Cytoecological studies of Silene rotundifolia Nutt., S. virginica L., and hybrid. Ohio J. Sci. 50:97-101.
117. _. 1951. Some cytoecological aspects in the evolution of certain species of the plant genus Silene. Ohio J. Sci. 51: 62-70.
118. Hill, C. A. 1981. Origin of cave saltpeter. Natl. Speleol. Soc. Bull. 43: 110-126.
119. Hinkle, C. R. 1989. Forest communities of the Cumberland Plateau of Tennessee. J. Tennessee Acad. Sci. 64: 123-129.
120. Hitchcock, C. L. & B. Maguire. 1947. A revision of the North American species of Silene. Univ. Washington Publ. Biol. 13: 1-73.
121. Hoffman, R. W. 1987. Taphonomy and zooarcheology of rockshelters of the Big South Fork Area of the Cumberland Plateau, Tennessee and Kentucky. Ph.D. diss., University of Tennessee, Knoxville.
122. Homoya, M. A., D. B. Abrell, J. R. Aldrich & T. W. Post. 1984. The natural regions of Indiana. Proc. Indiana Acad. Sci. 94: 245-268 + colored map of the natural regions of Indiana by M. A. Homoya.
123. Howell, B. J. 1981. A survey of folklife along the Big South Fork of the Cumberland River. Univ. Tennessee Dept. Anthrop. Rep. Invest. No. 30.
124. Hultén, E. 1964. Remarkable range extension for Minuartia groenlandica (Retz.) Ostenf. Sv. Bot. Tidskr. 58: 432-435.
125. Iltis, H. H. & W. M. Shaughnessy. 1960. Preliminary reports on the flora of Wisconsin No. 43. Primulaceae-Primrose family. Trans. Wisconsin Acad. Sci., Arts & Letts. 49: 113-135.
126. Iwatsuki, K. 1964. An American species of Stegnogramma. Amer. Fern J. 54: 141-143.
127. Jacobson, R. J. 1992. Geology of the Goreville quadrangle, Johnson and Williamson counties, Illinois. Illinois Geol. Surv. Bull. 97.
128. Jennings, J. N. 1968. Tafoni. Pages 1103-1104 in R. W. Fairbridge (ed.), The encyclopedia of geomorphology. Reinhold Book, New York.
129. Jensen, H. W. 1944. Heterochromosome formation in the genus Ilex. Amer. Naturalist 78: 375-379.
130. Jillson, W. R. 1969. The geology of Powell County, Kentucky. Roberts Printing, Frankfort, Kentucky.
131. Kawano, S. 1965. Application of pectinase and cellulase in an orcein squash method. Bot. Mag. (Tokyo) 78: 36-42.
132. Keener, C. S. 1976. Studies in the Ranunculaceae of the southeastern United States. II. Thalictrum L. Rhodora 78: 457-472.
133. _. 1983. Distribution and biohistory of the endemic flora of the mid-Appalachian shale barrens. Bot. Rev. (Lancaster) 49: 65-115.
134. King, R. M. & H. Robinson. 1970. Studies in the Eupatorieae (Compositae). XIX. New combinations in Ageratina. Phytologia 19: 208-229.
135. Klotz, L. H. & J. L. Walck. 1993. Rare vascular plants associated with limestone in southwestern Franklin County, Pennsylvania. Bartonia, Suppl. to No. 57: 16-41.
136. Koch, A. R. 1976. Floristics and ecology of algae on sandstone cliffs in east-central and southeastern Ohio. Ph.D. diss., Ohio State University, Columbus.
137. Kral, R. 1966. Observations on the flora of the southeastern United States with special reference to northern Louisiana. Sida 2: 395-408.
138. _. 1973. Some notes on the flora of the southern states, particularly Alabama and middle Tennessee. Rhodora 75: 366-410.
139. _. 1983. A report on some rare, threatened, or endangered forest-related vascular plants of the south. 2 vols. U.S.D.A. Forest Service Techn. Publ. R8-TP 2.
140. Kruckeberg, A. R. 1954. Chromosome numbers in Silene (Caryophyllaceae): I. Madroño 12: 238-246.
141. _. 1960. Chromosome numbers in Silene (Caryophyllaceae). II. Madroño 15: 205-215.
142. _. 1963. Artificial crosses involving eastern North American Silenes. Brittonia 16: 95-105.
143. Larcher, W. 1995. Physiological plant ecology. Ed. 3. Springer-Verlag, Berlin.
144. Lersten, N. R. & J. D. Curtis. 1986. Tubular cavities in white snakeroot, Eupatorium rugosum (Asteraceae). Amer. J. Bot. 73: 1016-1021.
145. Lowe, E. N. 1921. Plants of Mississippi: A list of flowering plants and ferns. Mississippi Geol. Surv. Bull. No. 17.
146. Ludlow, C. J. & F. T. Wolf. 1975. Photosynthesis and respiration rates of ferns. Amer. Fern J. 65: 43-48.
147. Macior, L. W. 1970. Pollination ecology of Dodecatheon amethystinum (Primulaceae). Bull. Torrey Bot. Club 97: 150-153.
148. Maguire, B. 1951. Studies in the Caryophyllaceae - V. Arenaria in America north of Mexico. A conspectus. Amer. Midl. Naturalist 46: 493-511.
149. Malott, C. A. 1924. The Upper Chester of Indiana. Proc. Indiana Acad. Sci. 34: 103-132.
150. Manning, R. 1993. The historic Cumberland Plateau: An explorer's guide. University of Tennessee Press, Knoxville.
151. 3 photosynthesis in the gametophyte of the epiphytic CAM fern Pyrrosia longifolia (Polypodiaceae). Amer. J. Bot. 82: 441-444.
152. Martin, J. A., R. D. Knight & W. C. Hayes. 1961. Ordovician System. Pages 20-32 in J. W. Koenig (ed.). The stratigraphic succession in Missouri. Missouri Div. Geol. Surv. Water Resources Ser. 2, Vol. 40.
153. Martin, W. H., W. S. Bryant, J. S. Lassetter & J. B. Varner. 1979. The Kentucky River Palisades flora and vegetation. Report submitted to Kentucky Chapter of The Nature Conservancy, Frankfort.
154. McDowell, R. C. 1981. Correlation chart for units on the geologic map of Kentucky. U.S. Geol. Surv. Misc. Field Studies Map MF-1291.
155. McFarlan, A. C. 1954. Geology of the Natural Bridge State Park area. Kentucky Geol. Surv. Ser. 4, Special Publ. No. 4.
156. McNeill, J. 1980. The delimitation of Arenaria (Caryophyllaceae) and related genera in North America, with 11 new combinations in Minuartia. Rhodora 82: 495-502.
157. Medley, M. E. 1980. Status report on Solidago albopilosa E. L. Braun. Report submitted to U.S. Fish and Wildlife Service, Atlanta.
158. Melampy, M. N. & A. M. Hayworth. 1980. Seed production and pollen vectors in several nectarless plants. Evolution 34: 1144-1154.
159. Milici, R. C., G. Briggs, L. M. Knox, P. D. Sitterly & A. T. Statler. 1979. The Mississippian and Pennsylvanian (Carboniferous) Systems in the United States-Tennessee. U.S. Geol. Surv. Profess. Pap. 1110-G.
160. Miller, J. R., D. F. Ritter & R. C. Kochel. 1990. Morphometric assessment of lithologic controls on drainage basin evolution in the Crawford Upland, south-central Indiana. Amer. J. Sci. 290: 569-599.
161. Mohlenbrock, R. H. 1978. The illustrated flora of Illinois. Flowering plants: Hollies to loasas. Southern Illinois University Press, Carbondale.
162. _. 1987. Alum Cove, Arkansas. Nat. Hist. 96(4): 60-62.
163. _ & J. W. Voigt. 1959. A study of the filmy fern Trichomanes boschianum. Amer. Fern J. 49: 76-85.
164. Mohr, C. 1901. Plant life of Alabama. Contrib. U.S. Natl. Herb. 6: 1-921.
165. Moore, J. E. 1965. A study of the vegetation of Petit Jean Mountain in central Arkansas. Castanea 30: 1-37.
166. Morris, M. W. 1986. A sediment analysis of three rocksheiter sites within the drainage of the Big South Fork. Pages F1-F32 in T. A. Ferguson, R. A. Pace, J. W. Gardner & R. W. Hoffman (eds.), An archaeological reconnaissance and testing of indirect impact areas within selected development sites of the Big South Fork National River and Recreation Area. Final report submitted to U.S. Army Corps of Engineers, Nashville District, Nashville, Tennessee.
167. Morton, J. K. 1981. Chromosome numbers in Compositae from Canada and the U.S.A. J. Linn. Soc., Bot. 82: 357-368.
168. Nasrulhaq-Boyce, A. & M. A. H. Mohamed. 1987. Photosynthetic and respiratory characteristics of Malayan sun and shade ferns. New Phytol. 105: 81-88.
169. Olah, L. V. & R. A. DeFilipps. 1968. A cytotaxonomic study of French's shooting star. Bull. Torrey Bot. Club 95: 186-198.
170. _ & _. 1969. Oversize Dodecatheon frenchii in Illinois. Bull. Torrey Bot. Club 96: 378-379.
171. Ormerod, D. E. 1983. White Rocks: A Woodland rocksheiter in Monroe County, Ohio. Kent State Res. Pap. Archaeol. No. 4.
172. Outerbridge, W. F. 1987. The Logan Plateau, a young physiographic region in West Virginia, Kentucky, Virginia, and Tennessee. U.S. Geol. Surv. Bull. 1620.
173. Pace, R. A., R. W. Hoffman & J. W. Gardner. 1986. Regional overview. Pages 5-54 in T. A. Ferguson, R. A. Pace, J. W. Gardner & R. W. Hoffman (eds.), An archaeological reconnaissance and testing of indirect impact areas within selected development sites of the Big South Fork National River and Recreation Area. Final report submitted to U.S. Army Corps of Engineers, Nashville District, Nashville, Tennessee.
174. Palmer-Ball, B., Jr., J. J. N. Campbell, M. E. Medley, D. T. Towles, J. R. MacGregor & R. R. Cicerello. 1988. Cooperative inventory of endangered, threatened, sensitive and rare species, Daniel Boone National Forest, Somerset Ranger District. Kentucky Nature Preserves Commission, Frankfort.
175. Parks, J. C. 1987. First record of Vittaria gametophytes in eastern Maryland. Bartonia No. 53: 61.
176. _. 1989. Distribution of gametophytic populations of Vittaria and Trichomanes in Pennsylvania. Rhodora 91: 201-206.
177. _ & D. R. Farrar. 1984. A first report of the fern genus Vittaria in New York. Rhodora 86: 421-423.
178. Paul, C. & W. Moffitt. 1959. The Quaker State Site - An Indian rock shelter. Pennsylvania Archaeol. 29: 51-65.
179. Pence, V. C. 1991. Cryopreservation of seeds of Ohio native plants and related species. Seed Sci. Techn. 19: 235-251.
180. Perkins, B. E. 1981. Vegetation of sandstone outcrops of the Cumberland Plateau. M.S. thesis, University of Tennessee, Knoxville.
181. Prufer, O. H. 1981. Raven Rocks: A specialized Late Woodland rocksheiter occupation in Belmont County, Ohio. Kent State Res. Pap. Archaeol. No. 1.
182. Quarterman, E. & R. L. Powell. 1978. Potential ecological/geological natural landmarks on the Interior Low Plateaus. U.S. Department of the Interior, Washington, DC.
183. Quinn, J. H. 1958. Plateau surfaces of the Ozarks. Proc. Arkansas Acad. Sci. 11: 36-43.
184. Raine, C. A., D. R. Farrar & E. Sheffield. 1991. A new Hymenophyllum species in the Appalachians represented by independent gametophyte colonies. Amer. Fern J. 81: 109-118.
185. Rau, J. L. 1970. Pennsylvanian System of northeast Ohio. Pages 69-89 in P. O. Banks & R. M. Feldman (eds.), Guide to the geology of northeastern Ohio. Northern Ohio Geological Society, Cleveland.
186. Raunkiaer, C. 1934. The life forms of plants and statistical plant geography. Clarendon Press, Oxford.
187. Ray, L. L. 1974. Geomorphology and Quaternary geology of the glaciated Ohio River Valley - a reconnaissance study. U.S. Geol. Surv. Profess. Pap. 826.
188. Redfearn, P. L., Jr. 1987. Habitat and distributional notes on selected mosses of the Interior Highlands of North America. Mem. New York Bot. Gard. 45: 232-236.
189. Reed, C. F. 1951. Notes on the ferns of Kentucky, II. Trichomanes boschianum. Amer. Fern J. 41: 120-123 + plate 8.
190. Reilly, M. J. 1992. Photosynthetic pigment analysis and determination of the pigment protein complexes in gametophytes of the low light intensity-adapted fern, Vittaria appalachiana. M.S. thesis, Indiana University of Pennsylvania, Indiana.
191. Rice, C. L. 1984. Sandstone units of the Lee Formation and related strata in eastern Kentucky. U.S. Geol. Surv. Profess. Pap. 1151-G.
192. _ & R. G. Ping. 1989. Geology of the Middlesboro north quadrangle, Kentucky. U.S. Geol. Surv. Map GQ-1663.
193. _, E. G. Sable, G. R. Dever Jr. & T. M. Kehn. 1979. The Mississippian and Pennsylvanian (Carboniferous) Systems in the United States-Kentucky. U.S. Geol. Surv. Profess. Pap. 1110-F.
194. Rohrbach, P. 1868. Monographie der Gattung Silene. W. Engelmann, Leipzig.
195. Rosendahl, C. O. 1951. A new Heuchera from Missouri together with some notes on the Heuchera parviflora group. Rhodora 53: 105-109.
196. _, F. K. Butters & O. Lakela. 1936. A monograph on the genus Heuchera. University of Minnesota Press, Minneapolis.
197. Ruchhoft, R. H. 1986. Kentucky's land of the arches. Pucelle Press, Cincinnati, Ohio.
198. Rydberg, P. A. 1932. Flora of the prairies and plains of central North America. The New York Botanical Garden, Bronx.
199. Sauer, C. O. 1918. Geography. Pages 1-83 in C. O. Sauer, G. H. Cady & H. C. Cowles (eds.), Starved Rock State Park and its environs. Geogr. Soc. Chicago Bull. No. 6.
200. _. 1927. Geography of the Pennyroyal. Kentucky Geol. Surv. Ser. 6, Vol. 25.
201. Schilling, E. E. 1996. Chloroplast DNA restriction site analysis of Eupatorieae (Asteraceae) from eastern North America. Amer. J. Bot. 83, Suppl. to No. 6: 190 (abstract).
202. Schmalzer, P. A., T. S. Patrick & H. R. DeSelm. 1985. Vascular flora of the Obed Wild and Scenic River, Tennessee. Castanea 50: 71-88.
203. Schwegman, J. E. 1973. Comprehensive plan for the Illinois nature preserves system, part 2: The natural divisions of Illinois. Illinois Nature Preserves Commission, Springfield.
204. _. 1982. Additions to the vascular flora of Illinois. Castanea 47: 243-247.
205. _. 1984. The jeweled shooting star (Dodecatheon amethystinum) in Illinois. Castanea 49: 74-82.
206. Segars, C. B., L. C. Crawford & A. M. Harvill. 1951. The occurrence and distribution of hemlock in Alabama. Ecology 32: 149-151.
207. Semple, J. C., G. S. Ringius, C. Leeder & G. Morton. 1984. Chromosome numbers of goldenrods, Euthamia and Solidago (Compositae: Astereae). II. Additional counts with comments on cytogeography. Brittonia 36: 280-292.
208. _, J. Zhang & C. Xiang. 1993. Chromosome number determinations in fam. Compositae, tribe Astereae. V. Eastern North American taxa. Rhodora 95: 234-253.
209. Shaver, J. M. 1954. Ferns of Tennessee with the fern allies excluded. Bureau of Publications, George Peabody College for Teachers, Nashville, Tennessee.
210. Shaver, R. H., C. H. Ault, A. M. Burger, D. D. Carr, J. B. Droste, D. L. Eggert, H. H. Gray, D. Harper, N. R. Hasenmueller, W. A. Hasenmueller, A. S. Horowitz, H. C. Hutchison, B. D. Keith, S. J. Keller, J. B. Patton, C. B. Rexroad & C. E. Wien 1986. Compendium of Paleozoic rock-unit stratigraphy in Indiana - A revision. Indiana Geol. Surv. Bull. 59.
211. Shaw, J. 1987. Evolution of heavy metal tolerance in bryophytes II. An ecological and experimental investigation of the "copper moss," Scopelophila cataractae (Pottiaceae). Amer. J. Bot. 74: 813-821.
212. Short, J. W. & J. D. Freeman. 1978. Rediscovery, distribution and phytogeographic affinities of Leptogramma pilosa in Alabama. Amer. Fern J. 68: 1-2.
213. Small, J. K. 1900. Notes and descriptions of North American plants. - II. Bull. Torrey Bot. Club 27: 275-281.
214. Smalley, G. W. 1986. Classification and evaluation of forest sites on the northern Cumberland Plateau. U.S.D.A. Forest Service, Southern Forest Exp. Sta. Gen. Techn. Rep. SO-60.
215. Smith, A. R. 1981. Pteridophytes. Pages 1-370 in D. E. Breedlove (ed.), Flora of Chiapas. California Academy of Sciences, San Francisco.
216. _. 1993. Thelypteridaceae Ching ex Pichi-Sermolli - marsh fern family.
217. Smith, B. D. 1992. Rivers of change: Essays on early agriculture in eastern North America. Smithsonian Institution Press, Washington, DC.
218. Smith, E. B. 1988. An atlas and annotated list of the vascular plants of Arkansas. Ed. 2, Published by the author, Fayetteville, Arkansas.
219. Solecki, M. K. 1983. Vascular plant communities and noteworthy taxa of Hawn State Park, Ste. Genevieve County, Missouri. Castanea 48: 50-55.
220. Soltis, D. E. 1980. Karyotypic relationships among species of Boykinia, Heuchera, Mitella, Sullivantia, Tiarella, and Tolmiea (Saxifragaceae). Syst. Bot. 5: 17-29.
221. _. 1985. Allozymic differentiation among Heuchera americana, H. parviflora, H. pubescens, and H. villosa (Saxifragaceae). Syst. Bot. 10: 193-198.
222. _ & R. K. Kuzoff. 1995. Discordance between nuclear and chloroplast phylogenies in the Heuchera group (Saxifragaceae). Evolution 49: 727-742.
223. Stebbins, G. L. 1980. Polyploidy in plants: Unsolved problems and prospects. Pages 495-520 in W. H. Lewis (ed.), Polyploidy: Biological relevance. Plenum Press, New York.
224. _ & J. Major. 1965. Endemism and speciation in the California flora. Ecol. Monogr. 35: 1-35.
225. Steyermark, J. A. 1934. Some features of the flora of the Ozark Region in Missouri. Rhodora 36: 214-233.
226. _. 1963. Flora of Missouri. Iowa State University Press, Ames.
227. Strausbaugh, P. D. & E. L. Core. 1978. Flora of West Virginia. Ed. 2. Seneca Books, Grantsville, West Virginia.
228. Studlar, S. M. & J. A. Snider. 1989. Bryophytes of the Red River Gorge of Kentucky: Floristics and phytogeography. Castanea 54: 133-152.
229. Sussenbach, T. 1990. Archaeological site distributions on the Cumberland Plateau of eastern Kentucky. Univ. Kentucky Program Cult. Resource Assessment Archaeol. Rep. 218.
230. Swayne, J. R. 1973. Paleoecology of southern Illinois and Pleistocene glaciation effect as indicated by modern distribution of disjunct species, French's shooting star, and cane. Ph.D. diss., Southern Illinois University, Carbondale.
231. _. 1985. Dodecatheon frenchii. Endangered species survey. Report submitted to Illinois Department of Conservation, Natural Heritage Division, Springfield.
232. Szmuc, E. J. 1970. The Mississippian System. Pages 23-67 in P. O. Banks & R. M. Feldman (eds.), Guide to the geology of northeastern Ohio. Northern Ohio Geological Society, Cleveland.
233. Tesmer, I. H. 1954. Geology of Chautauqua County, New York. Hobbies, Buffalo Mus. Sci. 35: 28-35.
234. _. 1975. Geology of Cattaraugus County, New York. Buffalo Soc. Nat. Sci. Bull. 27.
235. Thorn, R. H. & J. H. Wilson. 1980. The natural divisions of Missouri. Trans. Missouri Acad. Sci. 14: 9-23.
236. Thomas, W. A. 1972. Mississippian stratigraphy of Alabama. Alabama Geol. Surv. Monogr. 12.
237. Thompson, H. J. 1953. The biosystematics of Dodecatheon. Contrib. Dudley Herb. 4: 73-154.
238. Timme, S. L. & J. Lacefield. 1991. Dodecatheon frenchii (Vasey) Rydb. (Primulaceae) in Alabama. Rhodora 93: 189-191.
239. Tobe, J. D., J. E. Fairey III & L. L. Gaddy. 1992. Vascular flora of the Chauga River Gorge, Oconee County, South Carolina. Castanea 57: 77-109.
240. Tucker, G. E. 1984. Status report on Dodecatheon frenchii (Vasey) Rydb. Report submitted to U.S. Fish and Wildlife Service, Atlanta.
241. Ugent, D., M. Verdun & M. Mibb. 1982. The jeweled shooting star (Dodecatheon amethystinum): A postglacial migrant in the Mississippi Valley. Phytologia 51: 323-329.
242. U.S. Fish and Wildlife Service. 1992. Endangered and threatened wildlife and plants; threatened status for the plant Thelypteris pilosa var. alabamensis (Alabama streak-sorus fern). Fed. Regist. 57: 30164-30168.
243. _. 1993a. White-haired goldenrod recovery plan. U.S. Fish and Wildlife Service, Atlanta.
244. _. 1993b. Endangered and threatened wildlife and plants; review of plant taxa for listing as endangered or threatened species. Fed. Regist. 58: 51144-51190.
245. _. 1996a. Cumberland sandwort recovery plan. U.S. Fish and Wildlife Service, Atlanta.
246. _. 1996b. Endangered and threatened wildlife and plants; review of plant and animal taxa that are candidates for listing as endangered or threatened species. Fed. Regist. 61: 7596-7613.
247. Van Stockum, R. R., Jr. 1979. Hemlock - mixed mesophytic forest communities in southern Indiana, western Kentucky and Highlands, North Carolina. Ph.D. diss., University of Louisville, Louisville, Kentucky.
248. Vaughn, D. M. 1989. Valley modification by sapping processes in southern Indiana. Phys. Geogr. 10: 72-84.
249. Vento, F. J. 1985. The geology and geoarchaeology of the Bay Springs Rockshelters, Tishomingo County, Mississippi. Ph.D. diss., University of Pittsburgh, Pittsburgh.
250. Voigt, J. W. & R. H. Mohlenbrock. 1964. Plant communities of southern Illinois. Southern Illinois University Press, Carbondale.
251. _ & J. R. Swayne. 1955. French's shooting star in southern Illinois. Rhodora 57: 325-332.
252. Wagner, W. H., Jr., D. R. Farrar & B. W. McAlpin. 1970. Pteridology of the Highlands Biological Station area, southern Appalachians. J. Elisha Mitchell Sci. Soc. 86: 1-27.
253. Walck, J. L., C. C. Baskin & J. M. Baskin. In press. Comparative achene germination requirements of the rockhouse endemic Ageratina luciae-brauniae and its widespread close relative A. altissima (Asteraceae). Amer. Midl. Naturalist.
254. Weaver, R. E., Jr. 1970. The Arenarias of the southeastern granitic flat-rocks. Bull. Torrey Bot. Club 97: 40-52.
255. Webb, W. S. & W. D. Funkhouser. 1936. Rock shelters in Menifee County, Kentucky. Univ. Kentucky Rep. Archaeol. Anthrop. 3: 105-147.
256. Weir, G. W. 1974. Geologic map of the Slade quadrangle, east-central Kentucky. U.S. Geol. Surv. Map GQ-1183.
257. Wells, E. F. 1979. Interspecific hybridization in eastern North American Heuchera (Saxifragaceae). Syst. Bot. 4: 319-338.
258. _. 1984. A revision of the genus Heuchera (Saxifragaceae) in eastern North America. Syst. Bot. Monogr. 3: 45-121.
259. _ & B. A. Bohm. 1980. Chemotaxonomic studies in the Saxifragaceae s.l. 15. The flavonoids of subsection Villosae section Heuchera in the genus Heuchera. Canad. J. Bot. 58: 1459-1463.
260. Welsh, S. L. 1989. On the distribution of Utah's hanging gardens. Great Basin Naturalist 49: 1-30.
261. _, N. D. Atwood, S. Goodrich & L. C. Higgins (eds.). 1993. A Utah flora. Ed. 2 rev. Brigham Young University, Provo, Utah.
262. Wherry, E. T. 1939. Recent fern finds in West Virginia. Castanea 4: 1-4.
263. _. 1957. Which northeastern ferns are evergreen? Amer. Fern J. 47: 93-95.
264. _. 1961. The fern guide: Northeastern and midland United States and adjacent Canada. Doubleday and Co., Garden City, New York.
265. _. 1964. Some new name-combinations for southeastern ferns. Amer. Fern J. 54: 143-146.
266. Wilken, D. H. 1993. Silene. Pages 488-493 in J. C. Hickman (ed.), The Jepson manual: Higher plants of California. University of California Press, Berkeley.
267. Willard, R. W. 1960. Beaver Reservoir IV - Nature fashions the stage. Arkansas Archeol. Soc. Newslett. 1(8): 1-5.
268. Willman, H. B. & J. C. Frye. 1980. The glacial boundary in southern Illinois. Illinois Geol. Surv. Div. Circ. 511.
269. _, E. Atherton, T. C. Buschbach, C. Collinson, J. C. Frye, M. E. Hopkins, J. A. Lineback & J. A. Simon. 1975. Handbook of Illinois stratigraphy. Illinois Geol. Surv. Bull. 95.
270. Winterringer, G. S. 1949. Rock-ledge vegetation in southern Illinois. Ph.D. diss., University of Illinois, Urbana.
271. Wofford, B. E. 1976. The taxonomic status of Ageratina luciae-brauniae (Fern.) King & H. Robins. Phytologia 33: 369-371.
272. _. 1981. External seed morphology of Arenaria (Caryophyllaceae) of the southeastern United States. Syst. Bot. 6: 126-135.
273. _ & R. Kral. 1979. A new Arenaria (Caryophyllaceae) from the Cumberlands of Tennessee. Brittonia 31: 257-260.
274. _ & T. S. Patrick. 1980. Status report on Eupatorium luciae-brauniae Fernald. Report submitted to U.S. Fish and Wildlife Service, Atlanta.
275. _ & D. K. Smith. 1980. Status report on Arenaria cumberlandensis Wofford & Kral. Report submitted to U.S. Fish and Wildlife Service, Atlanta.
276. Wolfe, J. N. 1951. The possible role of microclimate. Ohio J. Sci. 51: 134-138.
277. _, R. T. Wareham & H. T. Scofield. 1949. Microclimates and macroclimate of Neotoma, a small valley in central Ohio. Ohio Biol. Surv. Bull. 41.
278. Wyss, J. D. & S. K. Wyss. 1977. An archaeological assessment of portions of the Red River Gorge, Daniel Boone National Forest, Kentucky. Report submitted to U.S.D.A. Forest Service, Daniel Boone National Forest, Winchester, Kentucky.
279. Yatskievych, G., M. A. Homoya & D. R. Farrar. 1987. The fern genera Vittaria and Trichomanes in Indiana. Proc. Indiana Acad. Sci. 96: 429-434.
280. Young, R. & A. Young. 1992. Sandstone landforms. Springer-Verlag, Berlin.