The Order Psilotales is characterized by a rootless, dichotomously branched sporophyte, which is partly underground and partly subaerial. The latter part may be leafless or leafy. The sporangia are in diads (e.g., Tmesipteris) or triads (e.g. Psilotum). The gametophytes are entirely subterranean. The Order includes two genera: Psilotum and Tmesipteris. Before the recognition of the […]
Affinities of Psilotales (With Diagram) | Pteridophyta | Botany
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Life Cycle of Psilotum | Pteridophyta | Botany
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Psilotum has two species – P. nudum (= P. triquetrum), which is erect and P. flaccidium, which is lax and pending, and grows epiphytically. The common Indian species of Psilotum is P. triquetrum. Psilotum is a rootless, slender plant, 20-100 cm. in length. The rhizome is covered with hair-like absorbing organs and frequently contains a […]