. Heredity and evolution in plants. Heredity; Plants. 172 HEREDITY AND EVOLUTION IN PLANTS Rubiaceae is the genus Mitchella, also relatively primitive, and containing only two species, one in Japan, the other the Partridge berry (M. repens) in North America. 123. Evidence from the Distribution of Liverworts.— The geographical distribution of the lower cryptogams (below the ferns and their allies) has not been the subject of as extensive study as that of the ferns and flowering plants, but the evidence marshalled by Campbell^ in 1907, concerning the distribution of the liverworts (Hepaticai), i
. Heredity and evolution in plants. Heredity; Plants. 172 HEREDITY AND EVOLUTION IN PLANTS Rubiaceae is the genus Mitchella, also relatively primitive, and containing only two species, one in Japan, the other the Partridge berry (M. repens) in North America. 123. Evidence from the Distribution of Liverworts.— The geographical distribution of the lower cryptogams (below the ferns and their allies) has not been the subject of as extensive study as that of the ferns and flowering plants, but the evidence marshalled by Campbell^ in 1907, concerning the distribution of the liverworts (Hepaticai), illustrates in a striking manner the importance of the. Fig. 78a.—Seed capsule and seeds of an orchid. facts of geographical distribution in endeavoring to determine the question of the relative age of a group of plants. It had been argued by Scott, in 1906, that the liverworts were probably of comparatively recent origin because of the almost entire absence of fossil remains in the Paleozoic rocks. But, as Scott himself records, impres- sions have been described from Paleozoic strata of plant forms that can be assigned only to the Hepaticae, and indeed to one of the most highly organized groups—the ' Campbell, Douglas Houghton. On the distribution of the Heptaticae, and its significance. New Phytologist 6: 203-212. Oct. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Gager, C. Stuart (Charles Stuart), 1872-1943. Philadelphia, P. Blakiston's Son & Co.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectplants, bookyear1920
