Psilotum
(from psilos, naked; the plants are almost destitute of leaves). ORD. Lycopodiaceae. A genus containing very numerous forms, which are, however, according to Mr. Baker's unpublished Synopsis of the Lycopodiaceae, reducible to two species. The one here described is a curious club-moss, inhabiting the tropical and sub tropical regions of both hemispheres. It is of little horticultural value. It thrives in well-drained pots of fibrous peat, or may be grown on pieces of such tree ferns as Dicksonia antarctica. P. triquetrum (three-sided). Stems dichotomously forked, compressed or angular, rigid, erect or slender, pendulous; branches numerous, triquetrous. l. obsolete or small, bract-like, shortly linear. Sporangia sub-globose, vertically trivalved, solitary in the axils of the leaves. h. 9in. 1793. (L. B. C. 1916.)