Coreocarpus arizonicus, the little lemonhead, 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),Biota of North America Program, 2013 county distribution map and in the adjacent Mexican States of Sonora, Chihuahua, Sinaloa, and Baja California Sur.Shreve, F. & I. L. Wiggins. 1964. Vegetation and Flora of the Sonoran Desert 2 vols. Stanford University Press, StanfordBlake, Sydney Fay 1913. Proceedings of the American Academy of Arts and Sciences 49: 344Smith, Edwin Burnell 1985. American Journal of Botany 72(4): 626, as Coreocarpus 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.Flora of North America, Coreocarpus arizonicus (A. Gray) S. F. Blake
VarietiesSEINet Southwest Biodiversity, Arizona Chapter, Coreocarpus arizonicus (A. Gray) Blake 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
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