ioo PRESENT-DAY GARDENING 



yellow (var. Zoysii), and pale lilac forms in cultivation, 

 it being a most variable plant. It was introduced from 

 the European Alps in 1752. 



V. canadensis. This is a handsome plant, growing 

 nearly one foot high, with white sweetly-scented flowers 

 tinged with violet. It is a native of Canada, and was 

 introduced in 1783. V. Rydbergii is the Colorado form 

 of this species. Both plants require a shady situation. 



V. canina (Dog Violet). This well-known species is 

 a native of Britain and other countries. The flowers are 

 blue, and they have a yellow spur. The species is very 

 variable, one variety having pure white flowers. 



V. cenisia. A lime-loving species from the Alps, with 

 violet flowers and a slender, arching spur. It grows about 

 6 inches high, and has slightly hairy leaves. 1759. 



V. cornuta (Horned Viola). A free-growing species 

 forming dense carpets of foliage, and large, light-purple 

 flowers. It is a valuable spring and summer flowering 

 plant. There is also a pure white-flowered form, as well 

 as other colour varieties, some of which are shown on the 

 coloured plate. It was introduced from the Pyrenees 

 in 1776, and is supposed to be one of the parents of the 

 bedding Violas. 



V. cucullata. This Violet has the margins of the leaves 

 turned up so as to resemble a kind of cup. It is a common 

 North American Violet, and will grow almost anywhere. 



