HARDY HERBACEOUS PERENNIALS. 



371 



are among the most popular of flowers. Propagated by 

 seeds or division. 



P. alchemilloides. White, 1 foot. Pyrenees. 



P. argyrophylla. Bright golden-yellow, 1 to 2 foot. Himalaya. 



P. Hopuvodiana. Pink and white, 1J foot. Garden variety. 



P. nepalensis. Cherry-red, 1^ foot. Himalaya. 



P. nitida. Soft-pink, silvery foliage, 2 to 3 inches. Europe 



P„ pyrenaica. Brilliant-yellow, 1 foot. Pyrenees. 



P. recta. Yellow, \\ foot. Europe. 



P. trideatata. White, 2 to 3 inches. North America. 



P. villosa. Yellow, 3 inches. Siberia. 



Fig. 



-Primula capitata. 



Primula. — An extensive genus of great beauty. Many 

 of the Alpine species are difficult of cultivation in English 

 gardens. They seem to require a gritty soil, and while 

 growing to be kept cool and moist, but in the autumn 

 and winter moisture is frequently detrimental, especially 

 if it is allowed to get in the crown of the plant. Some 

 of the Himalayan species are much more easily grown 

 in a rather shady, moist position, and where they thrive 

 they are very beautiful. P. rosea is happiest when 

 treated as a bog plant. Propagation by division and 

 seeds. 



P. acaulis. Yellow, 6 to 9 inches. Europe. 



P. Auricula. Bright clear-yellow, 4 inches. Europe. 



P. denticulata. Bright-lilac, 1 foot. Himalaya. 



,, var. capitata (fig. 458). Violet-blue, 1 foot. 



,, var. cashmiriana. Pale-lilac, 1 foot. 



P.frondosa. Rosy-lilac, silvery leaves, 4 inches. Thrace. 



P. japonica. Crimson, white, pink, variegated, &c, in whorls 

 on erect spikes, 1 to 1£ foot. Japan. 



P. longiflora. Bluish-purple, 6 inches. Europe. 



P. marginata. Rosy-violet, 6 inches. Switzerland. 



P mollis. Deep-red, 9 inches. Himalaya. 



P. rosea (fig. 459). Bright-rose, 9 inches. Himalaya. 



P. sikkimensis. Yellow, 1 to \\ foot. Himalaya. 



P. viscosa. Rose, 3 inches. Europe. 

 See also chapters on Polyanthus and Primrose. 



Prunella (Self-heal).— Pretty Sal via-like plants 9 inches 

 to 1 foot in height, with dense spikes of violet or purple 

 flowers. They are suitable for the rockery or the front 

 row of the border. P. grandiflora is the best species, the 

 flowers being a rich violet - purple colour. P. vulgaris 

 var. laciniata is a cut-leaved desirable plant, with deep- 

 purple flowers. A light, rich soil suits them, with a some- 

 what shaded position. Propagation by seeds or division. 



Pulmonaria (Lungwort). — Useful, early purp^ 

 flowered plants with pretty marbled and spotted leaves. 



Fig. 459.— Primula rosea grandiflora. 



They thrive in ordinary soil, and succeed best in shade. 

 P. arvcrnense, 9 to 12 inches high, has clusters of deep 



