Lygodium flexuosum

Lygodium flexuosum (L.) Sw.

Family     :  Lygodiaceae

Terrestrial herbs with long creeping rhizome, 5-8 mm thick, with fibrous roots at base; densely dark brown hairy, hairs 1 mm long, multicellualr, uniseriate, tubular. Fronds pale green, 4-5 m long, climbing, tripinnate; stipe stout, dark brown, densely hairy at base, strminaceous, glabrous above, wiry, 3-5 mm thick, rounded beneath, flattened above; primary pinnae alternate, stalked, forked once, with dormant bud on axis, each forked branch with 2-3 pairs of simple or forked pinnules alternately; pinnules 10-12 x 2.5-3 cm, oblong-lanceolate, simple or forked, or auriclate, apex subacute, acute or acuminate, base cuneate in simple pinnules, subtruncate or cordate in branched or forked pinnules; margin regularly or irregularly serrulate in sterile pinnules; costa raised above and below; veins distinct above and below, forked twice or thrice, free, reaching the margin, axis of main branches and costa pubescent; sporangia yellowish-brown, crowded on fingerlike lobes of fertile pinnae, lobes 3 x 1.5 mm, sporangia five pairs, alternate, indusiate. Spores 48 µm in diameter, yellowish-green.