Cylindropuntia fulgida, the jumping cholla, also known as the hanging chain cholla, is a cholla cactus native to Sonora and the Southwestern United States.
Closeup image of a cholla spine showing microscopic barbs which make removal extremely painful.
In plant morphology, thorns, spines, and prickles, and in general spinose structures, are hard, rigid extensions or modifications of leaves, roots, stems, or buds with sharp, stiff ends, and generally
Prickles on a blackberry branch
(A) Thorn or spine (B) Prickle
Smooth, featureless Citrus thorn.
Gymnosporia buxifolia thorn, its leaves, nodes, and emergence from an axillary bud demonstrating its nature as a branch.