A perennial from the Primulaceae family, this cultivar of Primula allionii is linked to the cliff-dwelling species of the Alpes-Maritimes and Liguria, confined to shaded limestone cliffs and crevices protected from direct rain, between approximately 500 and 1,800 meters. 'Ethel Barker' is a named selection, appreciated by collectors for the strength of its floral color.
The foliage is medium to fairly bright green, with oval leaves with slightly wavy edges and a visibly glandular surface, somewhat rough to the touch. The rosettes are relatively large for the species, which highlights the flowering by contrast.
The flowers are a deep magenta, almost purple, with a chromatic intensity that sharply contrasts with the softer pink tones of many other cultivars of the species. The white eye is well marked and stands out strongly against the dark background of the corolla. The petals are broad, slightly irregular, with slightly wavy edges that give each flower a slightly crumpled, lively appearance. The flowering is dense, with the flowers crowding above the foliage in a compact colorful mass. In its natural habitat, the species' flowering extends from March to May; in cultivation, this cultivar generally blooms from February to April under cold shelter.
Like all Primula allionii, 'Ethel Barker' requires absolute protection against stagnant moisture on the foliage, a very mineral and draining substrate, and bright light without intense direct sunlight. Pot cultivation under open shelter remains the most reliable solution.