ON TREES AND SHRUBS. 



385 



beds occupied with permanent shrubs. It may also be used with 

 good effect for covering dry banks and such like places. 

 G. tinctoria elatior (G. elata, G. thyrsiflora) is of free growth 

 and very free-flowering. G. sagittalis (Spartium sagittale) is useful 

 as an edging to beds or for the rockery ; it is of prostrate habit 

 and bears brightly-coloured flowers. G. prostrata and G. pitosa 

 deserve a place in the rock garden. They are both of dwarf 

 habit and free blossomers. 



Gleditschia triacanthos (Three - thorned Acacia), G. 

 monosperma, and G. sinensis (G. ferox and G. horrida) are 

 tall, freely-branched trees, sup- 

 plied with formidable spines 

 and pinnate, rich green leaves. 

 They succeed best in a rich, 

 deep, loamy soil, and are good 

 town trees as well as effective 

 for park-planting. 



Gymnocladus canadensis 

 (Kentucky Coffee Tree) is a 

 liandsome foliage tree of free 

 growth. Its very large bipin- 

 nate leaves, composed of 

 small, dull bluish-green leaflets, 

 do not appear until late in 

 the spring, and its spikes of 

 white flowers are borne in 

 June. A rich, deep soil is 

 .advisable for this ornamental 

 tree. 



Halesia tetraptera (Silver 

 Bell Tree) is an ornamental 

 low-growing tree that succeeds 

 best in rather moist soil. Its 

 ■small Snowdrop-like flowers are 

 pure white, and appear freely 

 in April and May. H. corym- 



■bnsa (Pterostyrax corymbosum) is a very uncommon Japanese 

 shrub, and bears an abundance of small white floweis suffused 

 with rose-pink in corymbose panicles early in June; it grows 

 about 12ft. high, and succeeds well against a wall. H. hispida 

 (Pterostyrax hispiduni) (Fig. 249) also carries an abundance of 

 white flowers in corymbose racemes. It is free in growth, very 

 hardy, beautiful when in flower, but is not planted nearly so 

 much as it ought to be. H. diptera grows about 10ft. high, 

 and is deserving of a place in pleasure grounds. The snowy- 

 white flowers appear about three weeks after those of the first 

 mamed species, and remain a long time in perfection. 



2 c 



Fig. 249. — Halesia hispida. 



