References

(N.B. References preceded by one asterisk were
supported by DEB-9311687 (Pryer) and by two asterisks
were supported by DEB-930709 (Wolf).



1. Baldwin, B.G. 1992. Phylogenetc utility of the internal transcribed spacers of nuclear ribisomal DNA in plants: An example from the Compositae. Molec. Phylog, Evol. 1: 3-16.

2. Barrett, M., M.J. Donoghue, and E. Sober. 1991. Against consensus. Syst. Zool. 40: 486-493.

3. Bateman, R.M. 1994. Evolutionary-developmental change in the growth architecture of fossil rhizomorphic lycopsids: scenarios constructed on cladistic foundations. Biol. Rev. 69: 527-597.

4. Bateman, R.M. and W.A. Dimichele. 1994. Heterospory: The most iterative key innovation in the evolutionary history of the plant kingdom. Biol. Rev. 69: 345-417.

5. Baum, D.A. and A. Larson. 1991. Adaptation reviewed: a phylogenetic methodology for studying character macroevolution. Syst. Zool. 40: 1-18.

6. Bremer, K. 1988. The limits of amino acid sequence data in angiosperm phylogenetic reconstruction. Evolution 42: 795-803.

7. Bremer, K., C.J. Humphries, B.D. Mishler, and S.P. Churchill. 1987. On cladistic relationships in green plants. Taxon 36: 339-349.

8. Brooks, D.R. and D.A. McLennan. 1991. Phylogeny, Ecology, and Behaviour. University of Chicago Press, Chicago.

9. Bull, J.J., J.P. Huelsenbeck, C.W. Cunningham, D.L. Swofford, P.J. Waddell. 1993. Partitioning and combining data in phylogenetic analysis. Syst. Biol. 42: 384-397.

10. Bult, C.J., J.A. Sweere, and E.A. Zimmer. 1995. Cryptic sequence simplicity, nucleotide composition bias, and molecular coevolution in the large subunit of ribosomal DNA in plants: implications for phylogenetic analyses. Ann. Missouri Bot. Gard. 82: 235-246.

11. Chippindale, P.T. and Wiens, J.J. 1994. Weighting, partitioning, and combining characters in phylogenetic analysis. Syst. Biol. 43: 278-287.

12. Collins, T.M., P.H. Wimberger, and G.J.P. Naylor. 1994. Compositional bias, character-state bias, and character-state reconstruction using parsimony. Syst. Biol. 43: 482-496.

13. Conant, D.S., L.A. Raubeson, D.K. Attwood, and D.B. Stein. 1995. The relationships of Papuasian Cyatheaceae to New World tree ferns. Amer. Fern J. 85: 328-340.

14. Conway Morris, S., B.L. Cohen, A.B. Gawthrop, T. Cavalier-Smith. 1996. Lophophorate phylogeny. Science 272: 282.

15. Crane, E.H., D.R. Farrar, and J.F. Wendel. 1995. Phylogeny of the Vittariaceae: convergent simplification leads to a polyphyletic Vittaria. Amer. Fern J. 85: 283-305.

16. Crane, P.R. 1985a. Phylogenetic relationships in seed plants. Cladistics 1: 329-348.

17. Crane, P.R. 1985b. Phylogenetic analysis of seed plants and the origin of angiosperms. Ann. Missouri Bot. Gard. 72: 716-793.

18. Crane, P.R. 1990. The phylogenetic context of microsporogenesis. In S. Blackmore and R.B. Knox (eds.), Microspores: Evolution and Ontogeny, pp. 11-41. Academic Press, London.

19. Crane, P.R. and S. Lidgard. 1989. Angiosperm diversification and paleolatitudinal gradients in Cretaceous floristic diversity. Pp 377-407 in P.D. Taylor and G.P. Larwood, eds. Major evolutionary radiations. Clarendon, Oxford.

20. Delwiche, C.F. M. Kuhsel, and J.D. Palmer. 1995. Phylogenetic analysis of tufA sequences indicates a cyanobacterial origin of all plastids. Mol. Phylog. Evol. 4: 110-128.

21. de Queiroz, A. 1993. For consensus (sometimes). Syst. Biol. 42: 368-372.

22. de Querioz, K. and J. Gauthier. 1994. Toward a phylogenetic system of biological nomenclature. Trends Ecol. Evol. 9: 27.

23. Donoghue, M.J. 1989. Phylogenies and the analysis of evolutionary sequences, with examples from seed plants. Evolution 43: 1137-1156.

24. Donoghue, M.J. and M.J. Sanderson. 1992. The suitability of molecular and morphological evidence in reconstructing plant phylogeny. In Soltis, P.S., D.E. Soltis, and J.J. Doyle (eds.), Molecular systematics of plants, pp. 340-368. Chapman and Hall, New York.

25. Donoghue, M.J. and M.J. Sanderson. 1994. Complexity and homology in plants. In B.K. Hall (ed.), Homology. The hierarchical basis of comparative biology, pp. 394-421. Academic Press, San Diego.

26. Donoghue, M.J., J.A. Doyle, J. Gauthier, A.G. Kluge, and T. Rowe. 1989. The importance of fossils in phylogeny reconstruction. Annual Rev. Ecol. Syst. 20: 431-460.

27. Donoghue, M.J., R.G. Olmstead, J.F. Smith, and J.D. Palmer. 1992. Phylogenetic relationships of Dipsacales based on rbcL sequences. Ann. Missouri Gard. 79: 333-345.

28. Doyle, J.A. and M.J. Donoghue. 1986a. Relationships of angiosperms and Gnetales: A numerical cladistic analysis. In R.A. Spicer and B.A. Thomas (eds.), Systematic and taxomonic approaches to palaeobotany, pp. 177-198. Clarendon Press, Oxford.

29. Doyle, J.A. and M.J. Donoghue. 1986b. Seed plant phylogeny and the origin of angiosperms: An experimental cladistic approach. Bot. Rev. 52: 321-431.

30. Doyle, J.A. and M.J. Donoghue. 1992. Fossils and seed plant phylogeny reanalyzed. Brittonia 44: 89-106.

31. Doyle, J.A. and M.J. Donoghue. 1993. Phylogenies and angiosperm diversification. Paleobiology 19: 141-167.

32. Doyle, J.A., M.J. Donoghue, and E.A. Zimmer. 1994. Integration of morphological and ribosomal RNA data on the origin of angiosperms. Ann. Missouri Bot. Gard. 81: 419-450.

33. Doyle, J.J. 1992. Gene trees and species trees: molecular systematics as one-character taxonomy. Syst. Bot. 17: 144-163.

34. Doyle, J.J. and J.L. Doyle. 1987. A rapid DNA isolation procedure for small quantities of fresh leaf tissue. Phytochem. Bull. 19: 1-15.

35. Eernisse, D.J. and A.G. Kluge. 1993. Taxonomic congruence versus total evidence, and amniote phylogeny inferred from fossils, molecules and morphology. Mol. Biol. Evol. 10: 1170-1195.

36. Faith, D.P. 1991. Cladistic permutation tests for monophyly and nonmonophyly. Syst. Zool. 40: 366-375.

37. Felsenstein, J. 1985. Confidence limits on phylogenies: An approach using the bootstrap. Evolution 39: 783-791.

38. Felsenstein, J. 1993. PHYLIP (Phylogeny Inference Package) version 3.5c. Distributed by the author. Department of Genetics, University of Washington, Seattle.

39. Friedman, W.E. 1993. The evolutionary history of the seed plant male gametophyte. Trends in Ecology and Evolution 8: 15-21.

40. Galtier, J. 1981. Structures foliares de fougères et Pteridospermales du Carbonifère Inférieur et leur signification évolutive. Paleontographica B, 180: 1-38.

41. Galtier, J. and A.C. Scott. 1985. Diversification of early ferns. Proc. Roy. Soc. Edinb. 86B: 289-301.

42. Garbary, D.J., K.S. Renzaglia, and J.G. Duckett. 1993. The phylogeny of land plants: a cladistic analysis based on male gametogenesis. Plant Syst. Evol. 188: 237-269.

43. Gastony, G.J. and D. R. Rollo. 1995. Phylogeny and generic circumscriptions of cheilanthoid ferns (Pteridaceae: Cheilanthoideae) inferred from rbcL nucleotide sequences. Amer. Fern J. 85: 341-360.

44. Gensel, P.G. 1992. Phylogenetic relationships of the zosterphylls and lycopsids: Evidence from morphology, paleoecology, and cladistic methods of inference. Ann Missouri Bot. Gard. 79: 450-473.

45. Giovannoni, S.J., S. Turner, G.J. Olsen, S. Barns, D.J. Lane, and N.R. Pace. 1988. Evolutionary relationships among cyanobacteria and green chloroplasts. J. Bacteriol. 170: 3584-3592.

46. Graham, L.E. 1985. The origin of the life cycle of land plants. Amer. Sci. 73: 178-186.

47. Graham, L.E., C.F. Delwiche, and B.D. Mishler. 1991. Phylogenetic connections between the "green algae" and the "bryophytes". Adv. Bryol. 4: 213-244.

48. Hamby, R.K. and E.A. Zimmer. 1992. Ribosomal RNA as a phylogenetic tool in plant systematics. Pp. 50-91 in P.S. Soltis, D.E. Soltis, and J.J. Doyle (eds.). Molecular systematics of plants. Chapman and Hall, New York.

49. Harvey, P.H. and M.D. Pagel. 1991. The comparative method in evolutionary biology. Oxford University Press, Oxford.

50. Hasebe, M., and K. Iwatsuki, 1990. Chloroplast DNA from Adiantum capillus-veneris L., a fern species (Adiantaceae); clone bank, physical map, and unusual gene localization in comparison with angiosperm chloroplast DNA. Curr. Genet. 17: 359-364.

51. Hasebe, M., M. Ito, R. Kofuji, K. Ueda, K. Iwatsuki. 1993. Phylogenetic relationships of ferns deduced from rbcL gene sequence. J. Mol. Evol. 37: 476-482.

52. Hasebe, M., T. Omori, M. Nakazawa, T. Sano, M. Kato, and K. Iwatsuki. 1994. rbcL gene sequences provide evidence for the evolutionary lineages of leptosporangiate ferns. Proc. Natl. Acad. Sci. USA 91: 5730-5734.

* and ** 53. Hasebe, M., P.G. Wolf, K.M. Pryer, K. Ueda, M. Ito, R. Sano, G.J. Gastony, J. Yokoyama, J.R. Manhart, N. Murakami, E.H. Crane, C.H. Haufler, W.D. Hauk. 1995. Fern phylogeny based on rbcL nucleotide sequences. Amer. Fern J. 85: 134-181.

* and ** 53b. Hasebe, M., P.G. Wolf, W. Hauk, J.R. Manhart, C.H. Haufler, R. Sano, G.J. Gastony, N. Crane, K.M. Pryer, N. Murakami, J. Yokoyama, and M. Ito. 1994. A global analysis of fern phylogeny based on rbcL nucleotide sequences. Amer. J. Bot. 81 (Abstracts): 120. 

54. Hasegawa, M., H. Kishino, and N. Saitou. 1991. On the maximum likelihood method in molecular phylogenetics. J. Molec. Evol. 32: 443-445.

55. Haufler, C.H. and T.A. Ranker. 1995. RbcL sequences provide phylogenetic insights among sister species of the fern genus Polypodium. Amer. Fern J. 85: 361-374.

56. Hauk, W.D. 1995. A molecular assessment of relationships among cryptic species of Botrychium subgenus Botrychium (Ophioglossaceae). Amer. Fern J. 85: 375-394.

57. Hauser, D.L. 1992. Similarity, falsification and character state order - a reply to Wilkinson. Cladistics 8: 339-344.

58. Hauser, D.L. and W. Presch. 1991. The effect of ordered characters on phylogenetic reconstruction. Cladistics 7: 243-265.

59. Hibbett, D.S., Y. Fukumasa-Nakai, and M.J. Donoghue. 1995. Phylogenetic diversity in shitake inferred from nuclear ribosomal DNA sequences. Mycologia 87: 618-638. 

60. Hillis, D.M. 1987. Molecular versus morphological approaches to systematics. Annual Rev. Ecol. Syst. 18: 23-42.

61. Hillis, D.M., and J.J. Bull. 1993. An empirical test of bootstrapping as a method for assessing confidence in phylogenetic analysis. Syst. Biol. 42: 182-192.

62. Hillis, D.M. and J.P. Huelsenbeck. 1992. Signal, noise, and reliability in molecular phylogenetic analyses. J. Hered. 83: 89-195.

63. Holttum, R.E. 1947. A revised classification of leptosporangiate ferns. J. Linn. Soc. (Bot.) 53: 23-159.

64. Holttum, R.E. 1949. The classification of ferns. Biol. Rev. 24: 267-296.

65. Holttum, R.E. 1973. Posing the problems. In A.C. Jermy, J.A. Crabbe, and B.A. Thomas.(eds.), The phylogeny and classification of the ferns, pp. 1-10. Bot. J. Linn. Soc. 67 (Suppl. 1).

66. Hoot, S.B., A. Culham, and P.R. Crane. 1995. The utility of atpB gene sequences in resolving phylogenetic relationships: comparison with rbcL and 18S ribosomal DNA sequences in the Lardizabalaceae. Ann. Missouri Bot. Gard. 82: 194-207.

67a. Huelsenbeck, J.P. 1991. When are fossils better than extant taxa in phylogenetic analysis? Syst. Zool. 40: 458-469.

67b. Huelsenbeck, J.P., J.J. Bull, and C.W. Cunningham. 1996. Combining data in phylogenetic analysis. Trends Ecol. Evol. 11: 152-158.

68. Huelsenbeck, J.P., D.L. Swofford, C.W. Cunningham, J.J. Bull, and P.J. Waddell. 1994. Is character weighting a panacea for the problem of data heterogeneity in phylogenetic analysis? Syst. Biol. 43: 288-291.

69. Johnson, L.A. and D.E. Soltis. 1994. matK DNA sequences and phylogenetic reconstruction in Saxifragaceae, s.s. Syst. Bot. 19: 143-156.

70. Kenrick, P. and P.R. Crane. 1991. Water-conducting cells in early fossil land plants: Implications for the evolution of early tracheophytes. Bot. Gaz. 152: 335-356.

71. Kishino, H. and M. Hasegawa. 1989. Evaluation of the maximum likelihood estimate of the evolutionary tree topologies from DNA sequence data, and the branching order in Hominoidea. J. Molec. Evol. 29: 170-179.

72. Kjer, K.M. 1995. Use of rRNA secondary structure in phylogenetic studies to identify homologous positions: an example of alignment and data presentation from the frogs. Molec. Phylog. Evol. 4: 314-330.

73. Kranz, H. D. and V. A. R. Huss. 1996. Molecular evolution of pteridophytes and relationships to seed plants: evidence from complete 18S rRNA gene sequences. Plant Systematics and Evolution (in press).

74. Kranz, H.D., D. Miks, M. Siegler, I. Capesius, C.W. Sensen, and V.A.R. Huss. 1995. The origin of land plants: phylogenetic relationships among charophytes, bryophytes, and vascular plants inferred from complete small-subunit ribosomal RNA gene sequences. J. Mol. Evol. 41: 74-84.

75. Kubitzki, K. (ed.). 1990. The families and genera of vascular plants. In K.U. Kramer and P.S. Green (eds.), Vol. 1, Pteridophytes and gymnosperms. Springer-Verlag, Berlin.

76. Loconte, H. and D.W. Stevenson. 1990. Cladistics of the Spermatophyta. Brittonia 42: 197-211.

77. Loconte, H. and D.W. Stevenson. 1991. Cladistics of the Magnoliidae. Cladistics 7: 267-296.

78. Lovis, J.D. 1977. Evolutionary patterns and processes in ferns. In R.D. Preston and H.W. Woolhouse (eds.), Advances in botanical research, Vol. 4, pp. 229-415. Academic Press, London. 

79. Lutzoni, F. and R. Vilgalys. 1995. Integration of morphological and molecular data sets in estimating fungal phylogenies. Can. J. Bot. 73 (Suppl. 1): S649-S659.

79a. Mabee, P.M. 1989. Assumptions underlying the use of ontogenetic sequences for determining character state order. Trans. Amer. Fish. Soc. 118: 151-158.

80. Maddison, D.R. 1989. Reconstructing character evolution on polytomous cladograms. Cladistics 5: 365-377.

81. Maddison, D.R. 1991. The discovery and importance of multiple islands of most-parsimonious trees. Syst. Zool. 40: 315-328.

82. Maddison, D.R., M. Ruvolo, and D.L. Swofford. 1992. Geographic origins of human mitochondrial DNA: phylogenetic evidence from control region sequences. Syst. Biol. 41: 111-124.

83. Maddison, W.P. 1989. Reconstructing character evolution on polytomous cladograms. Cladistocs 5: 365-377.

84. Maddison, W.P. 1990. A method for testing the correlated evolution of two binary characters: are gains and losses concentrated on certain branches of a phylogenetic tree. Evolution 44: 539-557.

85. Maddison, W.P. 1991. Squared-change parsimony reconstructions of ancestral states for continuous-valued characters on a phylogenetic tree. Syst. Zoll. 40: 304-314.

86. Maddison, W.P. 1993. Missing data versus missing characters in phylogenetic analysis. Syst. Biol. 42: 576-581.

87. Maddison, W.P. and D.R. Maddison. 1992. MacClade. Analysis of phylogeny and character evolution. Version 3. Sinauer, Massachusetts.

88. Maidak, B.L., N. Larsen, M.J. McCaughey, R. Overbeek, G.J. Olsen, K. Fogel, J. Blandy, C.R. Woese. 1994. The ribosomal database project. Nucl. Acids Res. 22: 3485-3487.

89. Manhart, J.R. 1994. Phylogenetic analysis of green plant rbcL sequences. Molec. Phylog. Genet. Evol. 3: 114-127.

90. Manhart, J.R. 1995. Chloroplast 16S rDNA sequences and phylogenetic relationships of fern allies and ferns. Amer. Fern J. 85: 182-192.

91. Mickel, J.T. 1973. The classification and phylogenetic position of the Dennstaedtiaceae. Pp. 135-144 in A.C. Jermy, J.A. Crabbe, and B.A. Thomas, eds. The phylogeny and classification of the ferns. Bot. J. Linn. Soc. 67 (suppl. 1):i-xiv, 1-284.

92. Mickel, J.T. 1974. Phyletic lines in the modern ferns. Ann. Missouri Bot. Gard. 61: 474-482.

93. Mishler, B.D., P.H. Thrall, J.S. Hopple, E. De Luna, and R. Vilgalys. 1992. A molecular approach to the phylogeny of bryophytes: cladistic analysis of chloroplast-encoded 16S and 23S ribosomal RNA genes. Bryologist 95: 172-180.

94. Mishler, B.D. 1994. Cladistic analysis of molecular and morphological data. Amer. J. Phys. Anthro. 94: 143-156.

95. Mishler, B.D. and S.P. Churchill. 1984. A cladistic approach to the phylogeny of the "bryophytes". Brittonia 36: 406-424.

96. Mishler, B.D. and S.P. Churchill. 1985. Transition to a land flora: Phylogenetic relationships of the green algae and bryophytes. Cladistics 1: 305-328.

97. Mishler, B.D., L.A. Lewis, M.A. Buchheim, K.S. Renzaglia, D.J. Garbary, C.F. Delwiche, F.W. Zechman, T.S. Kantz, and R.L. Chapman. 1994. Phylogenetic relationships of the "green algae" and "bryophytes". Ann. Missouri Bot. Gard. 81: 451-483.

98. Nixon, K.C., W.L. Crepet, D. Stevenson, and E.M. Friis. 1994. A reevaluation of seed plant phylogeny. Ann. Missouri Bot. Gard. 81: 484-533.

99. Nixon, K.C., and J.I. Davis. 1991. Polymorphic taxa, missing values and cladistic analysis. Cladistics 7: 233-241.

100. Olmstead, R.G., and J.D. Palmer. 1994. Chloroplast DNA systematics: a review of methods and data analysis. Amer. J. Bot. 81: 1205-1224.

101. Olmstead, R.G., and J.A. Sweere. 1994. Combining data in phylogenetic systematics: An empirical approach using three molecular data sets in the Solanaceae. Syst. Biol. 43: 467-481.

102. Olsen, G.J., H. Matsuda, R. Hagstrom, and R. Overbeek. 1992. fastDNAml version 1.0.6. University of Illinois, Urbana and Argonne National Laboratory, Argonne, Illinois.

103. Olsen, G. ., H. Matsuda, R. Hagstrom, and R. Overbeek. 1994. fastDNAml: A tool for construction of phylogenetic trees of DNA sequences using maximum likelihood. Comput. Appl. Biosci. 10: 41-48.

104. Pagel, M. 1994. Detecting correlated evolution on phylogenies: a general method for the comparative analysis of discrete characters. Proc. R. Soc. Lond. 255: 37-45.

105. Pagel, M. and P.H. Harvey. 1989. Comparative methods for examining adaptation depend on evolutionary models. Folia Primatologica 53: 203-220.

106. Patterson, C. 1982. Morphological characters and homology. In K.A. Joysey and A.E. Friday (eds.), Problems of phylogenetic reconstruction, pp. 21-74. Academic Press, London.

107. Patterson, C. 1988. Homology in classical and molecular biology. Mol. Biol. Evol. 5: 603-625.

108. Pichi Sermolli, R.E.G. 1977. Tentamen pteridophytorum genera in taxonomicum ordinem redigendi. Webbia 31: 313-512.

*108a. Pryer, K.M. 1993. Ontogeny and phylogeny in the aquatic fern family Marsileaceae: cladistic analysis of morphological and molecular data. Amer. J. Bot. 80 (Abstracts): 172.

*108b. Pryer, K.M., F.M. Lutzoni, and A.R. Smith. 1994. Towards a fern phylogeny: integrating morphology and molecules. Amer. J. Bot. 81 (Abstracts): 122. (Invited contribution).

*108c. . Pryer, K.M. 1996. Ontogeny and phylogeny of marsileaceous ferns: evidence for heterochronic evolution. Amer. J. Bot. 83 (Abstracts): in press.

*109. Pryer, K.M., A.R. Smith, and J.E. Skog. 1995. Phylogenetic relationships of extant ferns based on evidence from morphology and rbcL sequences. Amer. Fern J. 85: 205-282.

*109b. Pryer, K.M. Ontogeny and phylogeny of marsileaceous ferns: evidence for heterochronic evolution. (in preparation for submission to Evolution).

110. Raubeson, L.A. and D.B. Stein. 1995. Insights into fern evolution from mapping chloroplast genomes. Amer. Fern J. 85: 193-204.

111. Rodrigo, A.G. 1996. On combining cladograms. Taxon 45: 267-274.

112. Rodrigo, A.G., M. Kelly-Borges, P.R. Berquist, P.L. Berquist. 1993. A randomisation test of the null hypothesis that two cladograms are sample estimates of a parametric phylogenetic tree. New Zealand J. Bot. 31: 257-268.

113. Rogers, S.O. and A.J. Bendich. 1985. Extraction of DNA from milligram amounts of fresh, herbarium, and mummified plant tissues. Pl. Molec. Biol. 5: 9-76.

114. Roth, V.L. 1984. On homology. Biol. J. Linn. Soc. 22: 13-29.

115. Roth, V.L. 1988. The biological basis of homology. In C.J. Humphries (ed.), Ontogeny and systematics, pp. 1-26. Columbia University Press, New York.

116. Roth, V.L. 1991. Homology and hierarchies: Problems solved and unresolved. J. Evol. Biol. 4: 167-194.

117. Roth, V.L. 1994. Within and between organisms: replicators, lineages, and homologues. In B.K. Hall (ed.), Homology. The hierarchical basis of comparative biology, pp. 302-337. Academic Press, San Diego.

118. Rothwell, G.W. 1987. Complex Paleozoic filicales in the evolutionary radiation of ferns. Amer. J. Bot. 74: 458-461.

119. Rothwell, G.W. 1994. Phylogenetic relationships among ferns and gymnosperms; an overview. J. Plant Res. 107: 411-416.

120. Rothwell, G.W. 1995. The fossil history of branching:: Implications for the phylogeny of land plants. Pp 71-86 in : P.C. Hoch and A.G. Stevenson (eds.). Experimental and molecular approaches to Plant Biosystematics. Missouri Botancial Garden, St. Louis

121. Rothwell, G.W. 1996. Pteridophytic evolution: an often underappreciated phytological success story. Rev. Palaeobot. Palynol. 90: 209-222.

122. Rothwell, G.W. and R. Serbet. 1994. Lignophyte phylogeny and the evolution of spermatophytes: a numerical cladistic analysis. Syst. Bot. 19: 443-482.

123. Rothwell, G.W. and R.A. Stockey. 1994. The role of Hydropteris pinnata gen. et sp. nov. in reconstructing the cladistics of heterosporous ferns. Amer. J. Bot. 81: 479-492.

124. Sanderson, M.J. 1989. Confidence limits in phylogenies: the bootstrap revisited. Cladistics 5: 113-129.

125. Sanderson, M.J. 1991. In search of homoplastic tendencies: Statistical inference of toplogical patterns in homoplasy. Evolution 45: 351-358.

126. Sillén-Tullberg. 1988. Evolution of gregariousness in aposematic butterfly larvae: a phylogenetic analysis. Evolution 42: 293-305.

127. Smith, A.R. 1995. Non-molecular phylogenetic hypotheses for ferns. Amer. Fern J. 85: 104-122.

128. Soltis, D.E., P.S. Soltis, T.G. Collier, and M.L. Edgerton. 1991. The Heuchera group (Saxigragaceae): Evidence for chloroplast transfer and paraphyly. Amer. J. Bot. 78: 1091-1112.

129. Stewart, W.N. and G.W. Rothwell. 1993. Paleobotany and the evolution of plants, ed. 2. Cambridge University Press, Cambridge.

130. Swofford, D.L. 1991a. When are phylogeny estimates from molecular and morphological data incongruent? In M.M. Miyamoto and J. Cracraft (eds.), Phylogenetic analysis of DNA sequences, pp. 295-333. Oxford University Press. 

131. Swofford, D.L. 1991b. PAUP: Phylogenetic analysis using parsimony. Version 3.1. Computer program distributed by the Illinois Natural History Survey, Champaign, Illinois.

132. Swofford, D.L. and D.P. Begle. 1993. PAUP: Phylogenetic analysis using parsimony. Version 3.1.1. User's manual. Laboratory of Molecular Systematics, Smithsonian Institution, Washington, D.C.

133. Swofford, D.L. and G.J. Olsen. 1990. Phylogeny reconstruction. Pp. 411-501 in Molecular Systematics, D.M. Hillis and C. Moritz, eds. Sinauer Associates, Sunderland, MA.

134. Taylor, T.N. and E.L. Taylor. 1993. The biology and evolution of fossil plants. Prentice-Hall, Inc., Englewood Cliffs, NJ. 

135. Thomas, B.A. 1991. The study of fossil ferns. British Pteridology 1891-1991: 7-16.

136. Thompson, J.D., Higgins, D.G., and T.J. Gibson. 1994. Clustal w: improving the sensitivity of progressive multiple sequence alignment through sequence weighting, position-specific gap penalities and weight matrix choice. Nucl. Acids Res. 22: 4673-4680.

137. Tryon, A.F. and B. Lugardon. 1991. Spores of the Pteridophyta. Springer-Verlag, New York.

138. Tryon, R.M. and A. Tryon. 1982. Ferns and allied plants, with special reference to tropical America. Springer-Verlag, New York.

139. Wagner, W. H., Jr. 1974a. Pteridology, 1947--1972. Ann. Missouri Bot. Gard. 61: 86--111. 

140. Wagner, W. H., Jr. 1974b. Structure of spores in relation to fern phylogeny. Ann. Missouri Bot. Gard. 61: 332--353.

141. Williams, D.M. 1996. Characters and cladograms. Taxon 45: 275-283.

**142. Wolf, P.G. 1995. Phylogenetic analyses of rbcL and nuclear ribosomal RNA gene sequences in Dennstaedtiaceae. Amer. Fern J. 85: 3-6-327.

**142a. Wolf, P. G. 1995. Use of molecular data in evolutionary studies of pteridophytes. Introduction. Amer. Fern J. 85: 101-103.

** 142b. Wolf, P. G. In press. Pteridophyte phylogenies based on analyses of DNA sequences: A multiple gene approach. (Conference Proceedings). In Pteridology in Perspective. M. Gibby and R. J. Johns (Eds.). Academic Press, London.

** 142c. Wolf, P.G. Utility of nucleotide variation in atpB for phylogenetic studies of pteridophytes. (in preparation for submission to Amer. J. Bot.)

** 142d. Wolf, P.G., R. L. Chapman, and T. A. J. Hedderson. Molecular phylogenies of vascular plants and a new hypothesis for the relationships of Psilotaceae. (in preparation for submission to Amer. J. Bot.)

**143. Wolf, P.G., P.S. Soltis, D.E. Soltis. 1994. Phylogenetic relationships of dennstaedtioid ferns: evidence from rbcL sequences. Mol. Phylog. Evol. 3: 383-392.

** 143a. Wolf, P. G. and D. S. Conant. 1994. Use of molecular data in evolutionary studies of pteridophytes. 1994. Amer. J. Bot. 81 (Abstract): 119.

**143b. Wolf, P. G. 1994. Relationships among genera in the Dennstaedtiaceae and Lindsaeaceae based on gene sequence variation. Amer. J. Bot. 81 (Abstract): 123-124. 

** 143c. Wolf, P. G. 1995. Pteridophyte phylogenies based on analyses of DNA sequences: A multiple gene approach. Presented at the International Pteridophyte Symposium, Kew Gardens.

** 144d. Wolf, P. G. 1996. Nucleotide sequences from atpB provide useful data for fern systematics. Amer. J. Bot. 83 (Abstract): in press. 

144. Wolfe, K.H. 1991. Protein-coding genes in chloroplast DNA: compilation of nucleotide sequences, database entries and rates of molecular evolution. Pp. 467-482 in L. Bogarad and I.K. Vasil (eds.). The photosynthetic apparatus: molecuar biology and operation, Vol. 7 in K. Vasil (ed. in chief), Cell culture and somatic cell genetics in plants. Academic Press, New York.

145. Yamada, Y., M. Matsuda, K. Maeda, C. Sakakibara and K. Mikata. 1994. The phylogenetic relationships of the saturn-shaped ascospore-forming species of the genus Williopsis Zender and related genera based on the partial sequences of 18S and 26S ribosomal RNAs (Saccharomycetaceae): the proposal of Komagataea gen. nov. Biosci Biotechnol Biochem 58: 1236-1244.