Androsace

Androsace, commonly known as rock jasmine, is a genus of flowering plants in the family Primulaceae, second only to "Primula" in the number of species. It is predominantly Arctic–alpine, with many species in the Himalayas (where the genus originated), the mountains of central Asia, the Caucasus, and the southern and central European mountain systems, particularly the Alps and the Pyrenees.
Plants of this genus are sometimes known as rock jasmines or fairy candelabras, and are widely cultivated for their dense cushions covered in white or pink flowers. There are roughly 110 species.
These plants have small entire or toothed leaves which form a basal rosette.
Taxonomy.
Recent molecular studies show that the genera "Douglasia" (found in north-western North America and easternmost Siberia), "Pomatosace" (an Himalayan endemic) and "Vitaliana" (a European endemic) are nested within "Androsace". Phylogenetic studies have also demonstrated that the ancestor of "Androsace" first appeared about 35 Mya ago and was most probably an annual species. Evolution towards the denser morphology of cushions took place two times independently in Asia and in Europe.
Species.
, "Plants of the World Online" recognizes the following species, including those formerly placed in "Douglasia" and "Vitaliana".
Former "Douglasia" species.
The online "Flora of North America" placed nine species in "Douglasia" that are now included in "Androsace" (names in "Androsace" from "Plants of the World Online"):
Cultivation.
The following species have gained the Royal Horticultural Society’s Award of Garden Merit. All are mat-forming evergreen perennials.