Sphenopholis obtusata

Sphenopholis obtusata

Sphenopholis obtusata

Taxonavigation

Taxonavigation: Poales
Classification System: APG IV Superregnum: Eukaryota Cladus: Diaphoretickes Cladus: CAM Cladus: Archaeplastida Regnum: Plantae Cladus: Angiosperms Cladus: Monocots Cladus: Commelinids Ordo: Poales

Familia: Poaceae
Subfamilia: Pooideae
Tribus: Poeae
Subtribus: Aveninae
Genus: Sphenopholis
Species: Sphenopholis obtusata

Name

Sphenopholis obtusata (Michx.) Scribn., Rhodora 8: 144 (1906)

Synonyms

• Homotypic
  • Aira obtusa Raf. in J. Phys. Chim. Hist. Nat. Arts 89: 104 (1819), nom. superfl.
  • Aira obtusata Michx. in Fl. Bor.-Amer. 1: 62 (1803)
  • Airopsis obtusata (Michx.) Desv. in J. Bot. (Paris) 1: 200 (1808)
  • Eatonia obtusata (Michx.) A.Gray in S.Watson & al., Bot. California 2: 302 (1880)
  • Festuca obtusata (Michx.) P.Beauv. in Ess. Agrostogr.: 163 (1812)
  • Graphephorum obtusatum (Michx.) D.L.Fu in Amer. J. Agric. Forest. 12: 250 (2024)
  • Poa obtusata (Michx.) Link in Handbuch 1: 71 (1829)
  • Reboulea obtusata (Michx.) A.Gray in Manual: 591 (1848)
• Homotypic
  • Agrostis obtusata Steud. in Nomencl. Bot., ed. 2, 1: 41 (1840), pro syn.
  • Aira mexicana Trin. ex E.Fourn. in Mexic. Pl. 2: 111 (1886), pro syn.
  • Aira truncata Muhl. in Descr. Gram.: 83 (1817)
  • Eatonia annua Suksd. in W. Amer. Sci. 15: 50 (1906)
  • Eatonia densiflora E.Fourn. in Mexic. Pl. 2: 111 (1886)
  • Eatonia obtusata var. laxiflora Gatt. in Tennessee Fl.: 96 (1887)
  • Eatonia obtusata var. purpurascens Rydb. & Shear in Bull. Div. Agrostol. U.S.D.A. 5: 30 (1897)
  • Eatonia obtusata var. robusta Vasey ex Rydb. in Contr. U.S. Natl. Herb. 3: 190 (1895), nom. illeg.
  • Eatonia obtusata var. robusta Vasey ex L.H.Dewey in Contr. U.S. Natl. Herb. 2: 544 (1894)
  • Eatonia pubescens Scribn. & Merr. in Circ. Div. Agrostol. U.S.D.A. 27: 6 (1900)
  • Eatonia robusta Rydb. in Bull. Torrey Bot. Club 32: 602 (1905)
  • Graphephorum densiflorum E.Fourn. in Bull. Soc. Bot. France 24: 182 (1877), nom. nud.
  • Koeleria lobata Steud. in Nomencl. Bot., ed. 2, 1: 849 (1841), pro syn.
  • Koeleria obtusata Trin. ex Steud. in Nomencl. Bot., ed. 2, 1: 849 (1841), pro syn.
  • Koeleria paniculata Nutt. in Gen. N. Amer. Pl. 2(Add.): 2 (1818)
  • Koeleria truncata (Muhl.) Torr. in Fl. New York 2: 469 (1843)
  • Reboulea gracilis Kunth in Révis. Gramin. 1: 341 (1830)
  • Reboulea obtusata var. lobata (Trin.) Farw. in Rep. (Annual) Michigan Acad. Sci. 17: 182 (1916)
  • Reboulea obtusata var. pubescens (Scribn. & Merr.) Farw. in Rep. (Annual) Michigan Acad. Sci. 17: 181 (1916)
  • Reboulea truncata Torr. ex Munro in J. Proc. Linn. Soc., Bot. 6: 43 (1861), pro syn.
  • Sphenopholis annua (Suksd.) A.Heller in Muhlenbergia 6: 12 (1910)
  • Sphenopholis obtusata var. lobata (Trin.) B.L.Rob. in Rhodora 10: 65 (1908)
  • Sphenopholis obtusata subsp. lobata (Trin.) Scribn. in Rhodora 8: 144 (1906)
  • Sphenopholis obtusata var. pubescens (Scribn. & Merr.) B.L.Rob. in Rhodora 10: 65 (1908)
  • Sphenopholis obtusata subsp. pubescens (Scribn. & Merr.) Scribn. in Rhodora 8: 144 (1906)
  • Sphenopholis obtusata f. purpurascens (Rydb. & Shear) Waterf. in Rhodora 50: 93 (1948)
  • Sphenopholis pubescens (Scribn. & Merr.) A.Heller in Muhlenbergia 6: 12 (1910)
  • Sphenopholis robusta (Vasey ex L.H.Dewey) A.Heller in Muhlenbergia 6: 12 (1910)
  • Trisetum lobatum Trin. in Mém. Acad. Imp. Sci. St.-Pétersbourg, Sér. 6, Sci. Math. 1: 66 (1830)

Distribution

Native distribution areas:

Continental: Northern America Regional: USA Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode I., South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming Regional: Canada Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland, Northwest Territories, Nova Scotia, Ontario, Prince Edward I., Québec, Saskatchewan, Yukon Regional: Mexico Mexico Central, Mexico Northeast, Mexico Northwest, Mexico Southwest Continental: Sourthern America Regional: Caribbean Dominican Republic, Haiti Continental: Pacific Regional: Northern Central Pacific Hawaii Introduced into: Germany, Japan, Nansei-shoto References: Brummitt, R.K. 2001. TDWG – World Geographical Scheme for Recording Plant Distributions, 2nd Edition

References

Primary references

Scribn., 1906. Rhodora; Journal of the New England Botanical Club. Cambridge, MA 8:144.

Additional references

• Clayton, W.D., Harman, K.T. & Williamson, H. 2006. World Grass Species – Synonymy database. The Board of Trustees of the Royal Botanic Gardens, Kew. Available for download as an Access file from Synonymy database. Reference page. 

Links

• Govaerts, R. et al. 2025. Sphenopholis obtusata in Kew Science Plants of the World Online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2025 November 19. Reference page. 
• Tropicos.org 2025. Sphenopholis obtusata. Missouri Botanical Garden. Published online. Accessed: 19 November 2025. Reference page.
• International Plant Names Index. 2025. Sphenopholis obtusata. Published online. Accessed: November 19 2025. Reference page.
• USDA, ARS, Germplasm Resources Information Network. Sphenopholis obtusata in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 07-Oct-06. Reference page. 

Vernacular names

• English: prairie wedgescale

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