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FNA | Family List | FNA Vol. 12 | Euphorbiaceae

23b. Croton pottsii (Klotzsch) Müller Arg. var. thermophilus (M. C. Johnston) M. C. Johnston, Southw. Naturalist. 5: 171. 1960.

Desert leatherweed Desert leatherweed

Croton corymbulosus Engelmann var. thermophilus M. C. Johnston, SouthW. Naturalist 3: 187. 1959; C. thermophilus (M. C. Johnston) B. L. Turner

Stems somewhat zigzag; erect radii of stellate hairs longer than lateral radii, thus pubescence appearing ± shaggy. Leaf blades usually 1–1.4 cm. Racemes mostly 0.5–0.9 cm. Styles usually 0.5–1 mm. Capsules 4 mm.

Flowering Jul–Oct. Basalt and limestone hills; of conservation concern; 700–1800 m; Tex.; Mexico (Coahuila).

Variety thermophilus is restricted to Brewster County and nearby Mexico.


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