Classification of Pteridophyta | Botany
In this article we will discuss about the classification of pteridophyta. i. Eusporangiate type, in which the sporangium develops from a group of superficial initials, e.g., Selaginella, Equisetum. ii. Leptosporangiate type, in which the sporangium develops from a single initial, e.g., Marsilea. a. Spores develop into a multicellular, gametophytic body called prothallus. b. Two sex organs, i.e., antheridia and archegonia [...]