Horned Spurge

needle duff of partly shaded pine understory on volcanic tuff soils and gravels between steep outcrops of steep upper canyon.

needle duff of partly shaded pine understory on volcanic tuff soils and gravels between steep outcrops of steep upper canyon.

needle duff of partly shaded pine understory on volcanic tuff soils and gravels between steep outcrops of steep upper canyon.

Synonyms: Euphorbia robusta, Tithymalus brachycera, Tithymalus robusta, Tithymalus montanus, and others