- n Marsilea clover ferns
Century Dictionary and Cyclopedia
- n marsilea A genus of aquatic or subaquatic cryptogamous plants, typical of the order Marsileaceœ. They have wide-creeping rootstocks, and leaves produced singly or in tufts from nodes of the rootstock, each consisting of a petiole and four sessile, equally spreading, deltoid-cuneate or oblanceolate leaflets with flabellate anastomosing veins. The conceptacles or sporocarps are ovoid or bean-shaped and two-valved, and emit a mucilaginous cord upon which are borne numerous oblong-cylindrical sori, each sorus containing numerous microsporangia and few macrosporangia. The genus is widely distributed, and embraces 40 species, of which 4 are North American. M. Drummondii is the Australian nardoo. Sometimes written Marsilia.