Citation: L., Sp. Pl. 1077 (1753).

Derivation: Greek blechnon, the name of a fern.

Synonymy: Not Applicable

Common name: None

Description:
Water-ferns.

Distribution:  Cosmopolitan; more than 200 species, especially in the Southern Hemisphere, 17 species in Australia.

Biology: No text

Key to Species:

1. Segments of barren fronds attached to the rhachis by a broad base
2. Undersurface very pale, often glaucous; lowermost pinnae oblong or broadly oblong; tips of pinnae entire	B. nudum 3.
2. Undersurface of frond slightly lighter than the upper; lowermost pinnae reduced to auricles; tips of pinnae toothed	B. chambersii 1.
1. Segments of barren fronds petiolate except near the apex
3. Lowermost pinnae not reduced	B. wattsii 4.
3. Lowermost pinnae much reduced	B. minus 2.

Author: Not yet available