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Costus

For the plant known in Ancient Rome as "costus", see Saussurea costus.
See Catherine of Alexandria for the man named Costus often held to be her father.

Costus
Costus pulverulentus in Costa Rica
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Clade: Commelinids
Order: Zingiberales
Family: Costaceae
Genus: Costus
L.[1]
Synonyms[1]

Costus is a genus of herbaceous perennial plants in the family Costaceae, erected by Linnaeus in 1753.[2][3] It is widespread through tropical and subtropical regions of Asia, Africa, and the Americas.[1][4][5]

Costus is often characterized and distinguished from relatives such as Zingiber (true ginger) by its spiraling stems. The genus as a whole is thus often called spiral gingers, but this can also refer to C. barbatus specifically.

Costus spectabilis is the floral emblem of Nigeria; its flowers are represented (erroneously in red instead of yellow color) on its coat of arms.[citation needed] It is important not to confuse Costus speciosus, C. spectabilis etc. with the herb known by the common name "costus".

Some species are of importance to herbivores, such as caterpillars of the restricted demon (Notocrypta curvifascia) which feed on Costus speciosus (crêpe ginger). The crêpe ginger is also a source of diosgenin, a compound used for the commercial production of various steroids, such as progesterone. In Trinidad and Tobago, a mix of Costus scaber juice and crushed Renealmia alpinia berries is used to treat dogs bitten by snakes.[6][failed verification]

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  6. ^ Schmelzer, Gaby; Gurib-Fakim, Ameenah; Arroo, Randolph; Bosch, C.H.; de Ruijter, A.; Simmonds, Monique; Lemmens, R.H.M.J.; Oyen, L.P.A. (2008). Plant Resources of Tropical Africa 11(1) : Medicinal plants 1 (PDF). pp. 191–194. Retrieved 2 June 2024.

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