Genus: 100 species.
Taxonomy: related to Argyroderma.
Region: Namibia, South Africa.
Name: from Greek "cheiris", meaning "sleeve"; leaves in pairs, differing from previous pairs in form, size, wither in the resting period, forming a papery sheath covering the succeeding pair.
BotanyHerb; succulent; perennial; semi-arid; clump-forming
Leaves: opposite, triangular in section, rarely flattened, surface velvety; in pairs, differing from previous pairs in form, size; wither in the resting period, forming a papery sheath covering the succeeding pair.
Flowers: daisy like, daytime, summer, singly; petals yellow, rarely purple or red.