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 […]