Plant stemless, always solitary; leaves densely rosulate, 30 x 13 cm; glaucous, tinged reddish, margins armed with pungent reddish-brown teeth; inflorescence branched into 2, 100 cm high; raceme capitate, densely flowered, flower yellow-reddish.
Plant stemless, solitary; leaves 20, densely rosulate, lanceolate -attenuate, 17 cm x 9 cm, bluish-grey; margins armed with cartilaginous teeth 3,5-4 mm high; inflorescence 50 cm, 2-branched; raceme subcapitate.
Small shrub to 2 m high. Flower yellow.
Acaulescent plant to forming small groups. Leaves rosulate, pale green
Tree to 7 m high, trunk diameter could reach 1 m.