Cenozoic and Mesozoic Bryophytes of North America

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Abstract
Since the delicate structure of bryophytes does not lend itself well to fossilization, few specimens which are undoubtedly bryophytic have been discovered. All known reports of North American fossil bryophytes have been compiled and illustrations of them or the original specimens examined. The species of fossil Hepaticae and Musci are arranged in accordance with modern ideas of classification and interrelationship currently accepted by bryologists. The Hepaticae are represented by the following genera: Hepaticites, 3 spp.; Marchantites, 8 spp., including M. yukonensis (Marchantia y. Hollick), M. pealei (Marchantia p. Knowlton), and M. wardii (Preissites w. Knowlton); METZGERIITES erected for M. glebosus (Hepaticites g. Harris) and "based on the family Metzgeriaceae;" and Jungermannites, 4 spp., including J. eophilus (Lejeunea e. Cock.) and J. cockerellii (Jungermanniopsis c. Howe and Hollick). The Musci are composed of the following genera: Muscittes, uncertain in Musci., 2 spp., including M. florissanti (Polytrichum? f. Knowlton); Sphagum, 2 spp.; Polytrichites 1 sp.; Plagiopodopsis 2 spp., including P. cockerelliae (Glyphomitrium c. E. G. Britton and Hollick); and PALAEOHYPNUM (Bryales Pleurocarpi) including P. arnoldi-anum, Oregon Miocene, P. brittoniae, Wash. Upper Miocene, P. brownii (Hypnum b. Kirchner), P. patens (Archaeo-mnium p. E. G. Britton apud Knowlton), and P. knowltoni (Rhynchostegium k. E. G. Britton). A list of names which should be excluded from fossil Bryophyta is included.

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