striking symmetry of a clump of pincushion euphorbia stems, euphorbia pulvinata, family euphorbiacieae

striking symmetry clump pincushion euphorbia stems pulvinata family euphorbiacieae succulent cactus plant geometric design cluster group nature pattern green overhead view south africa native endemic growth euphorbiaceae spine thorn stem prickly garden summer closeup background fresh foliage flora viewed single may grow thousands cushions also known as pulvini called heaps