ON TREES AND SHRUBS, 385 



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

 good effect for covering dry banks and such hke places. 

 G. tinct07-ia 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 

 ^ind bears brightly-coloured flowers. G. prostrata and G. piLosa 

 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. horridd) are 

 tall, freely-branched trees, sup- 

 plied w^ith 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 

 handsome 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. cory77i- 

 bosa {Pterostyrax cory^nbosmii) 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 hispidum) (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 })lanted nearly so 

 much as it ought to be. H. dipfera grows about lolt. high, 

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

 white flowers appear about three weeks after those of the first 

 Tiamed species, and remain a long time in perfection. 



2 c 



. Fig. 249. — Halesia hispida. 



