Viola cornuta
Viola cornuta, known as horned pansy or horned violet, is a species of flowering plant in the violet family Violaceae, native to the Pyrenees and the Cordillera Cantábrica of northern Spain at an altitude of . It is a low-growing, clump-forming temperate evergreen perennial, reaching in height and spread. It has mid-green ovate leaves with rounded teeth, and masses of delicate pale violet flowers in early summer. The flower consists of five strap-shaped petals with a slender spur. This plant, and the white-flowered Alba Group, have gained the Royal Horticultural Society's Award of  Garden Merit. It is a known host of the pathogenic fungus "Puccinia violae". Cultivation. "Viola cornuta" is hardy to USDA zones 6–11 (hardy in the UK to ). Many cultivars are hybrids with "Viola" × "wittrockiana", designated as "Viola" × "williamsii". Some of these, such as 'King Henry', may be hardy to zone 4.