PLANTS FOR ROCKERIES. 



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its varieties, South of Europe ; height 2 to 4 inches; 

 flowers purple, violet and rose shades : early 

 spring ; fronts of rockvvorks and low walls. Deep 

 loam. Layering and division after flowering, soft 

 cuttings in handlights, and seed in April. 



Calandrinia. — C. umbellata (unibellated). Chili; 

 height G inches ; flowers bright magenta crimson : 

 summer. Light sandy soil. Seeds in spring. 



C'AMrANULA (Bell Flower). — C. alpina (alpine), Europe ; 

 height 3 to 6 inches ; flowers deep blue : July. 

 C. barbata (bearded), European Alps ; height 6 to 

 12 inches; flowers blue: June. C. crespitosa 

 (tufted), temperate parts of Europe ; height 4 to (J 

 inches, creeping ; flowers deep blue. 

 C. alba, pure white : May to June. 

 C. carpatica (Carpathian), in variety ; 

 height 6 to 15 inches, dwarf ; flowers 

 blue shades and white : June to August. 

 C. cenisia (Mont Cenis) ; a little gem ; 

 height 3 inches ; flowers deep blue : 

 June. Between stones in deep, gritty, 

 loam and leaf soil. C. fragilis, South 

 of Italy ; height 4 to 6 inches ; flowers 

 lilac purple : July and August. C. gar- 

 ganica (Gargano), Italy ; height 3 to 6 

 inches ; flowers blue : May to September. 

 C. isophylla (equal-leaved), Italy ; trail- 

 ing ; flowers lilac blue, profuse : August. 

 C. i. alba, good white form of preceding. 

 C. pulla (russet), Eastern Europe ; height 

 3 to 6 inches, tufted growth ; flowers 

 bluish violet ; room to spread ; sandy 

 peat. C. rotundifolia (round-leaved), in 

 variety, Britain ; height 6 to 12 inches ; 

 flowers blue shades and white : summer. 

 Except where otherwise advised, open 

 positions. Eich, loamy soil. Division 

 and cuttings in spring, and seed. 



Cerastium (Mouse-eared Cliickweed), C. 

 Biebersteini (Bieberstein's), Caucasus. — 

 Height, 6 inches ; silvery -leaved, creeping; flowers 

 white : early summer. Exposed margins ; common 

 soil ; division and cuttings after flowering. 



Cyclamen (Sowbread). — The hardiest are among the 

 most beautiful rock plants. C. coum (Coum), 

 South of Europe ; height, 4 inches ; small species ; 

 flowers deep red, rosy red, and white : March, or 

 at the same time as the leaves appear. C. euro- 

 paeum (European). A species with tuberous root- 

 stock ; height 4 inches ; flowers bright red : August 

 to October. C. hederaefoliuni (Ivy-leaved), syno- 

 nym C. repandum (repand) ; South Europe ; 

 height 4 to 6 inches ; flowers various colours : 



April and May. Position for the diflerent species, 

 sheltered from cold, drying winds and fierce sun- 

 shine ; nooks at foot of rockwork ; soil, brown, 

 fibrous loam, leaf soil and well-decayed cow manure, 

 finely sifted. Plant tubers just below surface ; 

 increased by seed. 

 Cypripedium (Lady's Slipper), C. acaule (steinless). — 

 Northern United States ; height 8 to 1 2 inches ; 

 flowers, sepals, and petals greenish, lip warm 

 rose : May and June ; should be planted in a 

 fissure, where it can be kept .somewhat dry in the 

 winter. C. candidum (white), North America ; 

 height 12 inches. C. calceolus (common slipper), 



DiANTiirs Glacialis. 



Northern Europe; height 12 to IS inches; 

 flowers reddish brown, lip pale yellow : summer ; 

 limestone mixed with soil. C. guttatum (spotted), 

 Northern Russia and Siberia ; height 9 inches ; 

 flowers pure white, blotched with deep, rosy 

 purple : June. C. spectabile (showy), Northern 

 United States ; height 18 inches to 3 feet ; 

 flowers white and rose ; require a somewhat shady 

 position and peaty compost ; increased by division. 

 Diantiius (Pink). — D. alpestris (rock). — Europe; 

 height 6 to 9 inches ; flowers red : June. D. 

 alpinus (alpine), Austrian Alps ; height 3 to 

 4 inches ; flowers deep rose, spotted with crimson : 



