Azolla is a free-floating plant occurring in fresh water pools, tanks and back waters. The genus comprises of 6 species, of which A. filiculoides may be regarded as a cosmopolitan one. The common Indian species is A. pinnata (= A. imbricata). No fossil representative is known from earlier than the Lower Caeneozoic bed. The Sporophyte […]
Azolla: Sporophyte and Sporocarp (With Diagram) | Pteridophyta | Botany
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