Horticultural cultivar from the Primula x pubescens group, an alpine-origin hybrid resulting from the cross between Primula auricula and Primula hirsuta, family Primulaceae. The parent species are confined to rocks, crevices, and scree of the European Alps, between approximately 1,500 and 3,000 meters.
'Carmen' is a perennial forming low, dense, well-branched clumps, reaching 10 to 15 cm in height when in bloom. The photos show a plant that willingly develops between stones and spreads into several rosettes, giving it a naturally colonizing character in rock gardens. The foliage is medium to bright green, fleshy, with a crenate margin, without visible farina, more reminiscent of the influence of Primula hirsuta.
The flowers, gathered in umbels on short stems, are a deep magenta-pink to carmine-pink, with a well-marked white eye. The shade varies slightly depending on sunlight and growing conditions, sometimes shifting towards violet-pink. In cultivation, flowering occurs in April-May.
It thrives in wall crevices and well-drained rock gardens, in sunny to semi-shaded exposure, in slightly calcareous mineral soil. Its tendency to form several adjacent rosettes makes it particularly suited for planting between stone blocks, where it naturally finds the drainage and root coolness conditions that suit it.