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Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Monocots
Cladus: Commelinids
Ordo: Poales

Familia: Poaceae
Subfamilia: Chloridoideae
Tribus: Cynodonteae
Subtribus: Gouiniinae
Genus: Triplasis
Species: T. americana – T. purpurea
Name

Triplasis P.Beauv., Ess. Agrostogr.: 81 (1812)
Type species: Triplasis americana P.Beauv., Ess. Agrostogr.: 81 (1812)

Synonyms

Heterotypic
Uralepis Nutt., Gen. N. Amer. Pl. 1: 62 (1818)
Uralepsis Nutt., Gen. N. Amer. Pl. 1: 62 (1818)
Diplocea Raf., Amer. J. Sci. (New York), ed. 2, 1: 252 (1819)
Merisachne Steud., Syn. Pl. Glumac. 1: 117 (1854)

References

Palisot de Beauvois, A.M.F.J. (1812) Essai d'une Nouvelle Agrostographie 81.
Govaerts, R. et al. 2014. Triplasis in World Checklist of Selected Plant Families. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the internet. Accessed: 2014 Jan. 3. Reference page.
Simon, B.K., Clayton, W.D., Harman, K.T., Vorontsova, M., Brake, I., Healy, D. & Alfonso, Y. 2014. GrassWorld, Triplasis. Published on the internet. Accessed: 2014 Jan. 3.
Tropicos.org 2014. Triplasis. Missouri Botanical Garden. Published on the internet. Accessed: 2014 Jan. 3.
International Plant Names Index. 2014. Triplasis. Published online. Accessed: 3 Jan. 2014.

Triplasis is a genus of North American plants in the grass family. Sandgrass is a common name for plants in this genus.[2] The genus name Triplasis is Greek, meaning "threefold", referring to the triple nerved lemmas.[3]
Description

The plants are slender-tufted perennials or annuals with short, slender leaf blades. Their short and open purplish panicles have few flowers and terminate the culms. Axils of the leaves can bear narrow and cleistogamous panicles.

Species of the genus have few-flowered spikelets and remote florets. The slender rachillas are terete and disarticulate above the glumes and between the florets. The narrow lemmas have three nerves and two lobes.[4]
Species

The genus Triplasis includes:[5]

Triplasis americana P.Beauv.
Triplasis purpurea (Walter) Chapm.

The genus formerly included:

Triplasis setacea - Tripogon spicatus

References

"Triplasis P.Beauv". Kew World Checklist of Selected Plant Families. Retrieved 5 August 2018.
"Triplasis". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 15 December 2015.
Merrit Lyndon Fernald (1970). R. C. Rollins (ed.). Gray's Manual of Botany (Eighth (Centennial) - Illustrated ed.). D. Van Nostrand Company. p. 130. ISBN 0-442-22250-5.
Bulletin of the U.S. Department of Agriculture. The United States Department of Agriculture. 1921. p. 76.
"The Plant List search for Triplasis". The Plant List. 2013. Retrieved 5 August 2018.

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Biology Encyclopedia

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