254 ROCK GARDENS 



Cardamine, syn. Dentaria (Cruciferae), Ladies' Smock 



Vigorous-growing plants for a half-shady position in damp loam 

 and leaf-mould. They are more useful than choice plants for 

 associating with the coarser-growing kinds in the bog garden. 

 The following are the best varieties : — 



C. bulbifera. — Fern-like foliage and pale purple flowers in loose 

 spikes. Flowering in spring and growing i to 2 feet high. 



C. digitata. — Grows only about 12 inches high. Rich purple 

 flowers in flat racemes. Blooms m April. 



C. enneaphylla. — Creamy-white flowers in clusters in April and 

 June. Grows about 12 inches high. 



C. trifolia. — Forms a neat mass of dark green leaves about 

 3 inches high, of rather creeping habit, from which rise spikes about 

 6 inches long of large, pure white flowers. This variety is about 

 the choicest of the genus. 



Carlina acaulis 



An everlasting. Requires full exposure to the sun in the 

 poorest of soil, otherwise it loses its brilliant appearance and grows 

 coarse. Thorny rosettes of leaves, on each of which lie silvery- 

 white, thistle-like flowers. Propagated by seed. 



Cassandra {see Andromeda) 

 Cassiope {see Andromeda) 



Castilleja acuminata 



Peaty soil. Spikes of labiate yellow flowers ; with the envelop- 

 ing bract are a most brilliant vermilion. Quite hardy, but difficult 

 to cultivate. Grows 18 inches to 2 feet high. 



Cathcartia villosa 



Requires a sheltered nook in light, rich soil. Of the Poppy tribe, 

 and nearly related to the Meconopsis. Grows about 12 inches 

 high, with silky, vine-shaped leaves, and large yellow flowers with 

 brown anthers. Hardy, but only a biennial. Increased by seed, 

 which is freely produced. 



Cerastium (Caryophyllaceae), Mouse-ear Chickweed 



Tufted plants of spreading habit and silvery leaves. Useful, but 

 by no means choice rock plants. All grow freely in hot, dry 

 positions in ordinary soil. 



