Coix
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The best-known species is Coix lacryma-jobi, widely called Job's tears. Its variety Coix lacryma-jobi var. ma-yuen is cultivated in many warm regions as a source of food, medicine, and ornamentation.
The generic name is from Ancient Greek κόϊξ (koix), which originally referred to the doum palm (Hyphaene thebaica); the fruits of the doum palm resemble the diaspores of Coix.
Species
- Coix aquatica Roxb. - China (Yunnan, Guangdong, Guangxi), Indian Subcontinent, Indochina, Peninsular Malaysia; naturalized in New Guinea
- Coix gasteenii B.K.Simon - northern Queensland
- Coix lacryma-jobi L. - China, Indian Subcontinent, Southeast Asia; naturalized in other parts of Asia as well as in southern Europe, Africa, the Americas, and various oceanic islands
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Formerly Included
see Chionachne Polytoca Tripsacum
- Coix angulata - Tripsacum dactyloides
- Coix barbata - Chionachne gigantea
- Coix crypsoides - Chionachne gigantea
- Coix dactyloides - Tripsacum dactyloides
- Coix gigantea J.Koenig 1788 not J.Koenig ex Roxb. 1932 - Chionachne gigantea
- Coix heteroclita - Polytoca digitata
- Coix koenigii - Chionachne gigantea
- Coix sulcata - Chionachne punctata
Formerly included in
This genus was formerly placed in the Maydeae, now known to be polyphyletic.
Proteins and expression
Members of this genus produce their own variety of α-zein prolamins. These prolamins have undergone unusually rapid evolutionary divergence from closely related grasses, by way of copy-number changes.