Euphorbia antisyphilitica
with Selaginella lepidophylla
Big Bend National Park, TX
Nov 1978

Euphorbia ceroderma
SW Pacific Coast, BCS
Mar 1996

Euphorbia misera
Vizcaíno Desert, BCN
Mar 1980

Euphorbia adenoptera

Euphorbia bicolor

Euphorbia ipecacuanhae

Euphorbia zinniiflora