The Miscellaneous Botanical Works of Robert Brown; III. Systematic Memoirs, and IV. Contributions to Systematic Works

The Miscellaneous Botanical Works of Robert Brown; III. Systematic Memoirs, and IV. Contributions to Systematic Works

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1867 edition. Excerpt: ... and M. de Beauvois (in Flore d'Oware, i, tab. 31). I have also observed it of the same form in specimens from Madagascar. There seems, therefore, no reason to doubt that these two 57- By these lines also S. squamosum is readily distinguished from Octoblepharum, in which the apparent number of teeth is the same: for in Octoblepharum each tooth has only a single pellucid line; and hence its affinity to certain species at present referable to Weissia, with a nearly similar habit and sixteen distinct teeth, whose axis is not perceptibly pellucid. Weissia splachnoides differs from the other Splachnea in having sixteen equidistant teeth; but as these teeth, according to the indication of the pellucid axis, are double, the arrangement may be compared with that of Tayloria and Systylium, in which the separation into thirty-two is complete, and the sixteen pairs equidistant. It agrees, however, also in this respect with Grimmia and with several species of Weissia: but in other important characters, as well as in habit, it is evidently related to Splachnum, and offers perhaps one of the best examples of the importance of the male flowers in distinguishing natural genera. Even Tetraphis pellucida may be cited in proof of the same prevailing number in the peristomium; each of its four teeth, when highly magnified, appearing to have seven longitudinal striae, which, according to this test, would make the real number thirty-two; a structure contributing to fix the place of Tetraphis in the natural series between Splachnum and Ortholrichum. 58o: Better evidence on the same subject is afforded by Trichostomum, Didymodon, and Leucodon, x all of which the thirty-two teeth are distinct, though approximated in pairs; by the sixteen bifid teeth of Dicranum more

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  • Paperback | 204 pages
  • 189 x 246 x 11mm | 372g
  • Miami Fl, United States
  • English
  • Illustrations, black and white
  • 1236515617
  • 9781236515612