作者

DEVOL CHARLES E.

型態特徵

A family of small floating ferns; stems horizontal, vegetative reproduction rapid due to fragmentation; roots absent. Leaves of two types:floating green leaves in pairs, the midrib distinct, the upper surface covered with papillae, the under-surface covered with straight multicellular hairs; submersed leaves finely dissected, root-like. Sporocarps borne in a cluster on a branch of the root-like leaf, globular or ovoid,m covered with multicellular hairs, extemal appearances alike, some containing megasporangia, others microsporangia; being borne on the much-branched receptacles.

屬

A family of only one living genus.

參考文獻