Colletia

Colletia is a genus of flowering plants in the family Rhamnaceae, with 5 species of spiny shrubs. All species of this genus are native to southern South America. They are non-legume nitrogen fixers.

Species
Colletia comprises the following species:[1][2]

Colletia hystrix Clos – pink crucifixion thorn
Colletia paradoxa (Spreng.) Escal. – crucifixion thorn, thorn of the cross, anchor plant
Colletia spartioides Bertero ex Colla
Colletia spinosissima J.F.Gmel.
Colletia ulicina Gillies & Hook.