EUPHORBIACEAE

Euphorbia chaetocalyx (Boissier) Tidestrom var. chaetocalyx

Bristlecup spurge

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