(Boissier) Tidestrom var. chaetocalyx
synonym: Chamaesyce fendleri Torrey & Gray var. chaetocalyx
This species differs from the similar Euphorbia fendleri in having lanceolate, rather than ovate-orbicular to ovate-lanceolate, leaves and in having narrowly deltate and entire, rather than obtuse and crenate, glandular appendages. Both species are perennial, unusual for spurges in this area.
Victorio Canyon, east side of the Florida Mountains 14 May 2009