Colletia is a genus of flowering plants in the family Rhamnaceae, with 15 to 17 species of spiny shrubs. All species of this genus are native to southern South America. They are non-legume nitrogen fixers.
Colletia ferox var. infausta; synonym Colletia infausta
Colletia hystrix - pink crucifixion thorn
Colletia paradoxa - crucifixion thorn, thorn of the cross, anchor plant
Colletia spinosa; synonym Colletia horrida
Pink, A. (2004). Gardening for the Million. Project Gu