Blechnum penna-marina subsp. alpina —Alpine Water Fern—BLECHNACEAE
Habitat—Often forming low mats in cooler, high altitude regions, commonly grows in Sphagnum bogs.
Distribution—Tasmania, Victoria and north to Mount Kaputar National Park in New South Wales.
Description—A terrestrial fern, rhizome mostly long-creeping, wiry, branched
Barrington/Gloucester Tops and Royal Botanic Gardens Sydney.
Fronds.—Fronds scattered, dimorphic, pinnatisect to pinnate, usually 8 to 25 cm, rarely to 45 cm long, slightly leathery; stipe red-brown, shiny. Sterile fronds erect, pinnatisect, broad bases of segments decurrent on rachis, middle segments 0.5 to 1.5 cm long, apex rounded, attached by broad base
Sori.—Fertile fronds pinnate, slightly taller and on longer stipes than the sterile ones; segments less than 1 cm long, 2 to 3 mm wide, widely spaced, curved having the whole surface beneath, except the midrib and a marginal strip, covered by sori. Indusia are continuous opening towards the midrib.