Coreopsis hamiltonii (Elmer) H.K. Sharsmith
Family: Asteraceae
[Leptosyne hamiltonii Elmer]
Coreopsis hamiltonii image
Dean Wm. Taylor  

Annuals, (3-)10-20+ cm. Leaf lobes oblong to linear, 1-8(-15) × 0.5-1 mm. Peduncles 3-9(-18) cm. Calyculi of 3-5 oblong to linear bractlets 1-3(-5) mm. Phyllaries 8, ± lance-ovate, 4-8 mm. Ray florets 8; laminae 3.5-8 mm. Disc florets ca. 40; corollas 2.5-3.5 mm. Paleae seldom basally adnate to and falling with disc cypselae. Ray cypselae narrowly obovate, 5-6 mm. Disc cypselae narrowly oblanceolate, 4-5 mm; pappi ca. 1 mm. 2n = 24.

Flowering Mar-May. Talus slopes, rocky soils; 600-1300 m; Calif.

Coreopsis hamiltonii image
Dean Wm. Taylor  
Coreopsis hamiltonii image
Dean Wm. Taylor  
Coreopsis hamiltonii image
Dean Wm. Taylor  
Coreopsis hamiltonii image
Dean Wm. Taylor  
Coreopsis hamiltonii image
Dean Wm. Taylor  
Coreopsis hamiltonii image
Dean Wm. Taylor