Lygodium Sw.
Sporangia subtended by an indusium-like outgrowth, marginal in biseriate spikes; spores tetrahedral. Rhachis of indefinite growth, high-climbing, twining; secondary rhachides very short, each bearing a pair of compound pinnae. Fertile pinnae copiously divided. About 40, mainly tropical to subtropical, spp. The N.Z. sp. is endemic.
