MARSILEACEAE

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1964, Flora Europaea - Volume 1. Lycopodiaceae to Platanaceae, Cambridge University Press : 23

XXIII. MARSILEACEAE 2

Semi-aquatic. Rhizomes slender, creeping, hairy, bearing leaves and roots at each node. Leaves alternate, 2-ranked, filiform or cruciformly 4-foliolate. Sporocarps tough and stony, borne singly in the leaf axils or on stalks adnate to the petiole, and containing sori of megasporangia and microsporangia, each sorus surrounded by an indusium; annulus lacking or rudimentary. Female prothallus many-celled, male prothallus minute.

Leaves compound, long-stalked; lamina 4-foliolate 1. Marsilea Leaves simple, filiform 2. Pilularia