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Thalia L.
Sp. Pl. 1: 1193 (1753); Andersson, Nord. J. Bot. 1: 241-243 (1981).

Description:
     Rosulate or caulescent marsh plants. Inflorescence an often very richly branched synflorescence; spathes caducous. Florescence component of a single cymule; cymule subbrachyblastic, interphyll and bracteoles absent. Corolla tube obsolete; outer staminode 1, petaloid, showy; callose staminode conspicuously large with narrow petaloid rim; cucullate staminode with two appendages near base of lobe; style helically twisted when triggered, with a very long liplike protrusion from the ventral rim of the stigmatic orifice. Fruit caryopsislike; perisperm canal branched from the base. (From Kubitzki, et al., p. 292)

Geographical Distribution:
     Found mainly in seasonally humid parts of South America, two species also in southern USA. T. geniculata L. has a widespread population in Africa, and is sometimes regarded as a separate species (cf. Andersson, Nord. J. Bot. 1: 48-56, 1981).

Taxonomic Diversity:
     Comprises five to seven species.

Thalia geniculata L.
Thalia geniculata L.

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