Geogenanthus


Geogenanthus is a genus of plants with 3 species in the family Commelinaceae. The genus is distributed from Colombia to Amazonian Peru and Brazil. Two of its species are occasionally found in the horticultural trade as houseplants.

Systematics

Geogenanthus is a member of the subtribe Dichorisandrinae of the tribe Tradescantieae of the flowering plant family Commelinaceae.

Morphology

Aerial shoots unbranched and determinate in length, up to 0.75 m, with a terminal rosette of leaves. The leaves at lower nodes mere tubular leaf sheaths. All plant parts somewhat succulent. In the wild, plants grow on the floor of primary rainforests and possess a shallow underground, short, branching rhizome. Unlike its closest relatives in the family, Cochliostema and Plowmanianthus, its roots are both tuberous and actually penetrate the soil.
Flowers consist of 3 green-brown sepals, 3 blue, pink or purple petals fringed with moniliform hairs, 4-6 stamens - the posterior three of which may be bearded with monilifiorm hairs, and 3 connate carpels. Its flowers have no fragrance detectable by the human nose.