The structure & development of the mosses and ferns (Archegoniatae) . epresented by but one species, L. Ctin-ninghamii, a form which seems to be intermediate in generalcharacters between the Cyatheaceae and the other Hymeno-phyllaceae, but its life history and anatomy are not the other genera Hooker gives seventy-one species toHyinenopJiylhivi and seventy-eight to Tridiomanesr TJie GaiJietophyle The gametophyte is known more or less completely inseveral species of both Trichoinanes and Hymenophyllum. Thelarge spores germinate promptly, but their subsequent develop-ment is very slow. T
The structure & development of the mosses and ferns (Archegoniatae) . epresented by but one species, L. Ctin-ninghamii, a form which seems to be intermediate in generalcharacters between the Cyatheaceae and the other Hymeno-phyllaceae, but its life history and anatomy are not the other genera Hooker gives seventy-one species toHyinenopJiylhivi and seventy-eight to Tridiomanesr TJie GaiJietophyle The gametophyte is known more or less completely inseveral species of both Trichoinanes and Hymenophyllum. Thelarge spores germinate promptly, but their subsequent develop-ment is very slow. They contain chlorophyll, and often beginto germinate within the sporangium, where they may often befound divided into three equal cells by walls radiating fromthe centre (Fig. i86). All of the cells begin to grow out ^ Hooker and Baker (i).^ The number of species known now considerably exceeds this. XI THE HOMOSPOROUS LEPTOSPORANGIATA-l 361 into filaments, but usually only one of them develops into theprothallium, the others dividing only once or twice, and forming. Yic \Z(i. — Tricho]na7ies D7-aytoniaiiuiu (Brack). Germination of the spores, X 525 ; r, primary rhizoid. short brown rhizoids. In some species of Trichomanes, pyxidiferiun} the prothallium remains filamentous, andforms a densely branching structure very much like the ...s
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Keywords: ., bookcentury1800, bookdecade1890, bookidstructuredev, bookyear1895
