. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. THE HOMOSPOROUS LEPTOSPORANGIAT^ 373 of some of the larger Mosses, e. g., species of Mnium. Hooker (I) reduces them all to three genera, which, however, are often further divided. Of these Loxsoma is represented by but one species, L. Cunninghamii, a form which seems to be intermedi- ate in general characters between the Cyatheaceae and the other Hymenophyllaceae, but its life history and anatomy are not known. Of the other genera Hooker gives seventy-one species to Hymenophyllum and seventy-e
. The structure and development of mosses and ferns (Archegoniatae). Plant morphology; Mosses; Ferns. THE HOMOSPOROUS LEPTOSPORANGIAT^ 373 of some of the larger Mosses, e. g., species of Mnium. Hooker (I) reduces them all to three genera, which, however, are often further divided. Of these Loxsoma is represented by but one species, L. Cunninghamii, a form which seems to be intermedi- ate in general characters between the Cyatheaceae and the other Hymenophyllaceae, but its life history and anatomy are not known. Of the other genera Hooker gives seventy-one species to Hymenophyllum and seventy-eight to Trichomanes.^ The Gametophyte The gametophyte is known more or less completely in sev- eral species of both Trichomanes and Hymenophyllum. The. ... r. Fig. 214.âTrichomanes Draytonianum. Germination of the spores, X52S; rhizoid. /, primary large spores germinate promptly, but their subsequent develop- ment is very slow. They contain chlorophyll and often begin to germinate within the sporangium, where they may often be found divided into three equal cells by walls radiating from the centre (Fig. 214). All of the cells begin to grow out into filaments, but usually only one of them develops into the pro- thallium, the others dividing only once or twice, and forming slioi"t brown rhizoids. In some species of Trichomanes^ e. g. â ^The number of species known now considerably exceeds 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 Campbell, Douglas Houghton, 1859-1953. New York, The Macmillan Company;
Size: 1528px × 1636px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcampbelldouglashought, bookcentury1900, bookdecade1910
