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areas. Canad. J. Bot. 42:547-601 Bowden, W.M. 1967. Taxonomy of intergeneric hybrids of the tribe Triticeae from North America. Canad. J. Bot. 45:711-724 Brooks

Wislizenia (Capparaceae). Amer. J. Bot. 78: 925–937. Woodson, R. E. Jr. 1948. Gynandropsis, Cleome, and Podandrogyne. Ann. Missouri Bot. Gard. 35: 139–148. Arivela

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structure and significance of the leucobryaceous leaf. Monogr. Syst. Bot. Missouri Bot. Gard. 11: 111–120. Robinson, H. 1990. A functional evolution of the

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1943. A taxonomic revision of the genus Holodiscus (Rosaceae). Bull. Torrey Bot. Club 70: 275–288. Lis, R. A. 1990. A Taxonomic Revision of Holodiscus Maxim

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J. Linn. Soc., Bot. 73: 1--34. Perring, F. H. and B. G. Gardener, eds. 1976. The biology of bracken. [Symposium.] J. Linn. Soc., Bot. 73(1--3): i--vi

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subtribe Laeliinae genusEncyclia Show Lower Taxa Encyclia tampensis Hooker Bot. Mag. 55: plate 2831. 1828. Eric Hágsater Etymology: Greek enkyklos, to encircle

genusBommeria Show Lower Taxa Bommeria hispida E. Fournier in Baillon, Dict. Bot. 1: 448. 1877 [Named for the Belgian pteridologist. 1829. Christopher H. Haufler

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genusTimmiella speciesTimmiella crassinervis (Hampe) L. F. Koch Leafl. W. Bot. 6: 11. 1950,. Richard H. Zander Basionym: Trichostomum crassinerve Hampe

(Pennell) Munz Bull. Torrey Bot. Club 64: 291. 1937. Warren L. Wagner Basionym: Kneiffia sessilis Pennell Bull. Torrey Bot. Club 46: 366. 1919 Synonyms:

and the costa has elongate adaxial cells. The genus Gymnostomum needs revision as many species worldwide are of doubtful distinction or belong in other

misapplied to this species. Semple, J. C. and J. G. Chmielewski. 1987. Revision of the Aster lanceolatus complex, including A. simplex and A. hesperius

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sporophytes are absent in the two species of the flora area. Zander, R. H. 1972. Revision of the genus Leptodontium (Musci) in the New World. Bryologist 75: 213–280

subtribe Madiinae genusMadia speciesMadia elegans D. Don ex Lindley Edwards’s Bot. Reg. 17: plate 1458. 1831. Bruce G. Baldwin, John L. Strother Common names:

Californian representatives of the Ovales. Bull. Tor-rey Bot. Club 43: 601–620. Reznicek, A. A. 1993b. Revision of Carex section Ovales (Cyperaceae) in Mexico.

morphology of somatic chromosomes in Lilium. Amer. J. Bot. 34: 9–27. Synge, P. M. 1980. Lilies: A Revision of Elwes’ Monograph of the Genus Lilium and Its Supplements

Dicranella is retained here pending further study. Frahm, J.-P. et al. 1998. Revision der Gattung Dichodontium (Musci, Dicranaceae). Trop. Bryol. 14: 109–118

Missouri Bot. Gard. 85: 242–256. Bentham, G. 1873. Notes on the classification, history, and geographical distribution of Compositae. J. Linn. Soc., Bot 13:

eastern species. Canad. J. Bot. 47: 1257–1275. Petrak, F. 1917. Die nordamerikanischen Arten der Gattung Cirsium. Beih. Bot. Centralbl. 35(2): 223–567

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California. Ecology 70: 389--404. Bot. Gaz. = Botanical Gazette; Paper of Botanical Notes. Bot. Helv. = Botanica Helvetica. Bot. J. Linn. Soc. = Botanical Journal