PRINCIPAL SPECIES OF VIOLA 99 



the greater number of which are only found in Botanic 

 Gardens. 



V. alpina. This grows at high elevations on the 

 Eastern Alps. It has small, oval-shaped leaves borne on 

 long stalks. The flowers are purple and have a short spur. 



V. altaica. This species is supposed to be one of the 

 parents of the cultivated Pansy ; all those with pale-yellow 

 petals with an undulated margin being derived from this 

 plant. It is a native of the Altai Mountains, and has large 

 pale-yellow flowers, with a few dark-purple lines near the 

 base of the petals. It was introduced into cultivation in 

 1805, and the plants are easily propagated by seeds or 

 cuttings. 



V. arenaria. This is a rare native plant found in 

 Teesdale. It has small leaves and pale-blue flowers. Its 

 native habitat extends into various parts of Europe. 

 , V. biflora, The twin-flowered Violet is a dainty little 

 plant found on the Alps of Europe, and also in Siberia. 

 It has small, bright-yellow flowers, and must be given a 

 moist position. It was introduced in 1752. 



V. blanda. An early flowering species from North 

 America, with pubescent leaves, and white, small, faintly- 

 scented flowers ; the lateral petals are veined with lilac. 



V. calcarata. The alpine Pansy is a lovely plant, 

 forming tufts of foliage, and bearing large violet and 

 purple flowers in the typical plant. There are white, 



