Viola cornuta (horned pansy)
A popular bedding plant with a light fragrance, horned pansy is native to the Pyrenees.
About this species
Viola cornuta is one of a group of species known as pansies (Viola section Melanium). Pansies differ from violets in that pansy flowers have four petals pointing upwards and only one directed downwards. The common name pansy is derived from the French pensée (meaning thought). Viola cornuta flowers have a characteristic long, thin, upward pointing nectar spur (which is from where the term 'horned' comes).
Geography & Distribution
Horned pansy is native to Spain and France, where it occurs in the high Pyrenees. It is widely planted and naturalised from garden escapes elsewhere (although naturalised plants can be hybrids).
Side view of Viola cornuta flower showing long, slender, upward-pointing nectar spur (Image: Sven Landrein)
Viola cornuta is a spreading, evergreen perennial (living for several years) growing up to 30 cm tall. The leaves, often present in a basal rosette, are narrowly to broadly egg-shaped. The stipules (leaf-like appendages on the stem where a leaf attaches) are large, free and deeply divided. The flowers are produced one to a stem and bloom from June to August. They are pollinated while they are open (unlike many other Viola species, which are self-fertilised without the flowers opening). There are five green sepals. The lightly fragrant flowers are violet in colour, up to 4 cm in diameter and have a long, slender spur. The flowers have five stamens (male parts), each with a triangular projection at the tip. The fruit is an explosive capsule opening by three valves. Seeds often have an oil body and are dispersed by ants.
Kew’s Olympic floral spectacular
From April to September 2012 a floral spectacular will be in bloom in front of the Orangery at Kew Gardens to celebrate the London 2012 Olympic Games. This enormous representation of the Olympic rings can even be admired by air passengers flying over the Gardens.
Cultivars of Viola cornuta make up the majority of the spring bedding for this 50 m display, which includes Viola ‘Light Blue’, Viola ‘Clear Yellow’, Viola ‘Black Delight’, Viola ‘Red Blotch’ and apple mint (Mentha suaveolens).
The five interlacing rings, designed in 1913 by founder of the modern Olympic Games Baron Pierre de Coubertin, represent the coming together of five continents to embrace the Olympic values: striving for excellence, demonstrating respect and celebrating friendship.
Horned pansy is widely cultivated as an ornamental. More than 25 cultivars (cultivated varieties of the species Viola cornuta) and hybrids (crosses between species) are available, which exhibit a range of characteristics, with flower colours in shades from white through to yellow and violet. Many cultivars have been created in part from crosses with V. × wittrockiana.
Millennium Seed Bank: Seed storage
The seed storage behaviour of Viola cornuta is orthodox (meaning the seeds will survive the drying and freezing process), although there are no collections currently stored in Kew’s Millennium Seed Bank based at Wakehurst in West Sussex.
This species at Kew
Pressed and dried specimens of Viola cornuta are held in Kew’s Herbarium, where they are available to researchers from around the world, by appointment. The details of herbarium specimens of many other species of Viola, including some images, can be seen online in the Herbarium Catalogue.
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