Echinopsis albispinosa
Echinopsis albispinosa is a species of cactus from Argentina. Although Echinopsis sylvestrii is a synonym of this species, it should not be confused with Chamaecereus silvestrii, which has a very different appearance.
Description
Echinopsis albispinosa usually grows singly, but occasionally branches and then forms small groups. The spherical to short cylindrical shoots reach heights of with diameters of. There are twelve to 14 ribs. The circular areoles on them are whitish. The single central spine protrudes. The five to nine marginal spines lie on the surface of the shoot.The long, tube-shaped, funnel-shaped, white flowers have no scent. They open at night. The flowers are up to long.