Coreocarpus arizonicus

Coreocarpus arizonicus (little lemonhead)[2] is a North American species of flowering plants in the daisy family native to northwestern Mexico and the southwestern United States. It has been found in southern Arizona (Pima, Santa Cruz, Cochise Counties),[3] and in the adjacent Mexican States of Sonora, Chihuahua, Sinaloa, and Baja California Sur.[4][5][6]

Coreocarpus arizonicus
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Asterids
Order:
Asterales
Family:
Asteraceae
Subfamily:
Asteroideae
Tribe:
Coreopsideae
Genus:
Coreocarpus
Species:
C. arizonicus
Binomial name
Coreocarpus arizonicus
(A. Gray) S.F. Blake
Synonyms[1]
  • Coreopsis arizonica (A.Gray) O.Hoffm.
  • Leptosyne arizonica A.Gray
  • Coreocarpus sanpedroensis E.B. Sm., syn of var. sanpedroensis

Coreocarpus arizonicus is a branching perennial subshrub up to 120 cm (48 inches) tall. The plant usually produces several flower heads, each head having yellow disc florets and white, purplish, yellow, or orange ray florets. Sometimes the ray florets are missing. The species grows in open sites along streams and in mountain canyons.[7]

Varieties[1][5][8]
  • Coreocarpus arizonicus var. arizonicus - Arizona, Sonora, Chihuahua, Baja California Sur
  • Coreocarpus arizonicus var. filiformis (Greenm.) S.F.Blake - Sinaloa
  • Coreocarpus arizonicus var. macrophyllus Sherff - Chihuahua
  • Coreocarpus arizonicus var. pubescens (B.L.Rob. & Fernald) S.F.Blake - Sonora
  • Coreocarpus arizonicus var. sanpedroensis (E.B.Sm.) B.L.Turner - Sonora

References
  1. The Plant List, Coreocarpus arizonicus (A.Gray) S.F.Blake
  2. "Coreocarpus arizonicus". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 21 June 2015.
  3. Biota of North America Program, 2013 county distribution map
  4. Shreve, F. & I. L. Wiggins. 1964. Vegetation and Flora of the Sonoran Desert 2 vols. Stanford University Press, Stanford
  5. Blake, Sydney Fay 1913. Proceedings of the American Academy of Arts and Sciences 49: 344
  6. Smith, Edwin Burnell 1985. American Journal of Botany 72(4): 626, as Coreocarpus sanpedroensis
  7. Flora of North America, Coreocarpus arizonicus (A. Gray) S. F. Blake
  8. SEINet Southwest Biodiversity, Arizona Chapter, Coreocarpus arizonicus (A. Gray) Blake


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