Blechnum L.
Coenosori in a continuous or almost continuous line on each side of the midrib covering the vascular commissures, having a membranous indusium opening inwards towards the costa. Veins of the sterile fronds free Blechnum
Fertile and sterile fronds dissimilar
Sterile fronds pinnate, pinnatisect or, if pinnatifid into numerous segments, then the segments not noticeably constricted at the base
Rhizome long-creeping, with the stipes scattered along the rhizome but often clustered at the apex of the rhizome. Plants 8–35 (rarely up to 45) cm high. Lamina firm, paler beneath, glabrous or almost so. Basal frond-segments widely spaced and much reduced in size. Middle sterile frond-segments 0.5–1.5 cm long. Blue Mts (Jenolan Caves). Cooler mountain regions usually amongst rocks and in boggy situations or amongst grass. Alpine Water-fern Blechnum penna-marinaalpina
Rhizome erect