Rebutia pulvinosa

Body in clusters, spherical to shortly cylindrical. Tubercles in at least 12 rows. Central spines 4-6 white. Radial spines 13-16, white, thinly bristly. Flowers white or pale pink. Fruit reddish to green.

Bolivia

Source: Thompson, A, ; Forbes, S.; Spencer, R. (1997). Cactaceae. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 2. Flowering plants. Dicotyledons. Part 1. The identification of garden and cultivated plants. University of New South Wales Press. (as Rebutia albiflora)

kingdom Plantae
phylum   Tracheophyta
class    Magnoliopsida
superorder     Caryophyllanae
order      Caryophyllales
family       Cactaceae
genus        Rebutia K.Schum.