Caespitose, perennial herb, hydrophyte, 90-380 mm high. Leaves rosulate, linear, ± spongy at base, tapering to apiculate. Capitula covered with hard, white setae; involucral bracts oblong-obovate, whitish. Female flowers: sepals 3, free, unequal, boat-like, keeled, dark grey, sometimes expanded into wing; apex bearded with white hairs; petals 3, free, unequal, linear, yellowish, with or without black glands below apex; ovary trigonous; style with 3 filiform branches. Male flower: sepals 3, cuneate-obovate, connate below into a spathe, 2 lobes slightly keeled, greyish with olive-green spot on each side; apex bearded; petals 3, free, black, unequal, bearded with white hairs on inner surface; stamens 6; anthers black. Flowering time Sept.-Feb.
Perennial herb, up to 380 mm high. Leaves with blade up to 80 mm long, apex long acuminate, ending in a fine point. Flowers: scape sheath usually longer than leaves; heads few, globose to semidiscoid, ± 8 mm in diameter, densely covered with short white setae; white; Oct.-Mar. Seeds uncommon, broadly ellipsoid.
Plants smaller, up to 100 mm tall. Leaves linear-acuminate, 50-100 mm long, apex attenuated into a long filiform point. Capitula globose to depressed globose, c. 8 mm in diam., bearing male and female flowers (no capitula with only male flowers seen). Flowers c. 2 mm long.
Perennial herb, up to 100 mm tall. Leaves up to 80 mm long, long acuminate, ending in a fine point. Capitula few, globose to semidiscoid, ± 8 mm in diameter, densely covered with short white setae. Flowers white.