Coix

Genus of grasses From Wikipedia, the free encyclopedia

Coix /ˈkɪks/ is a genus of Asian and Australian plants in the grass family.[3][4]

Quick facts Scientific classification, Type species ...
Coix
Coix lacryma-jobi
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Clade: Commelinids
Order: Poales
Family: Poaceae
Subfamily: Panicoideae
Supertribe: Andropogonodae
Tribe: Andropogoneae
Subtribe: Coicinae
Rchb. ex Clayton & Renvoize
Genus: Coix
L.
Type species
Coix lacryma-jobi
Synonyms[2]
  • Lachrymaria Heist. ex Fabr.
  • Lachryma-jobi Ortega
  • Lithagrostis Gaertn.
  • Lacryma Medik.
  • Sphaerium Kuntze
Close

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.[5][6]

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.[7]

Species

[2][8]

Formerly Included

[2] 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.[Sch 1]

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.[Sch 2]

References

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