Perennial, dwarf shrublet, up to 1.2 m high, main branches ascending, minutely papulose when young, rootstock tuberous. Leaves compressed-trigonous, apex recurved, bladder cells fine, glassy. Flowers in compact cymes, purple. Flowering time Oct., Nov. Capsules 5-locular, covering membranes complete, closing bodies absent, expanding keels diverging widely at apex, valve wings as broad as expanding keels.