ALPHABETICAL LIST OF PLANTS 291 



but well-drained ledge. They require plenty of moisture during the 

 summer, but in the winter should be kept dry, by placing a piece of 

 glass over them. Propagated by careful division in the autumn, or 

 by seed. 



H. caerulea {^Bluets). — Forms dense cushions of bright green 

 leaves about half an inch high, which from May to July is thickly 

 studded over with lovely little pale sky-blue flowers, on thread-like 

 stems about 2 inches high. A most dainty little gem, and should 

 find a place among the choicest rock plants. 



H. c. pallida has paler blue flowers, and alba^ white. Both are 

 lovely. 



H. purpurea. — Has purplish flowers. 



H. serpyllifolia. — Is even of dwarfer habit, and has white flowers. 



HUTCHINSIA ALPINA (CrUCIFERAE) 



A dainty, neat-growing little plant, forming dense little cushions 

 of dark green leaves about 3 inches high, which in summer are 

 covered with small pure white flowers in clusters. Grows readily 

 in any sandy soil, is of vigorous habit, and can easily be raised from 

 seed. In fact the trouble is to prevent it seeding itself over the rock 

 garden. A very charming little plant. 



H. rotundifolia (see /Ethionema cepeaefolium). 



Hypericum (Hypericaceae), St John's Wort 



A large genus of shrubs, some quite tall-growing, while others are 

 little more than trailing plants. They are all of easy culture in 

 ordinary, hght sandy loam, in an open position. Of the dwarf- 

 growing kinds. 



H. C^r?'^.— Makes little tufty bushes about 9 inches high, with 

 small, blue-grey foliage, and numerous golden-yellow flowers. A 

 very pretty and amenable little plant, and one of the best of the 

 genus. Evergreen. 



H. empetrifolium. — A half-hardy, evergreen, shrubby plant, grow- 

 ing 6 to 12 inches high. Numerous small, golden-coloured flowers 

 in the summer. 



H. fragilis.—K prostrate-growing evergreen plant, forming very 

 compact tufts, about 8 to 10 inches high, of slender branches, clothed 

 the whole length with small, bright green, ovate leaves. Large, 

 golden-yellow flowers borne in the greatest profusion the whole 

 summer. Of easy culture and quick growth, in any warm, well- 

 drained position, and readily increased by division. A very gem 

 for the rock garden ; the best of the family. 



H. repens.—h dwarf, trailing plant, with small, heath-like foliage. 



