ON TREES AND SHRUBS. 



389 



Itea virginica (Virginian Willow), which is rare in English 

 gardens, loves a cool, moist soil, and a shady position. It is 

 a North American shrub, bears abundant racemes of white flowers 

 in July and August, and usually grows about 4ft. high, forming 

 a neat, compact bush. 



Jamesia Americana, a native of the Rocky Mountains, forms 

 a low, much-branched bush, with greyish-green leaves, and in June 

 bears compact terminal clusters of white 

 flowers. Ordinary soil and a rather shady 

 position suits this rare shrub admirably. 



Juglans (Walnuts). — These are valuable 

 for ornamental planting, and prized for 

 their nuts, or fruits, which are abundantly 

 produced on large trees. The genus is 

 generally represented in parks and pleasure- 

 grounds by J. regia, which has been culti- 

 vated in this country upwards of 300 

 years, although noble specimens of the 

 Black Walnut (_/". nigra) are to be seen 

 in various parts of the British Isles. There 

 are, however, other species and varieties 

 deserving of recognition, by reason of their 

 ornamental qualities and freedom in growth. 

 The genus comprises less than a .dozen 

 species, most of which hail from North 

 America, and as they are all procurable in 

 this country they might be employed more 

 frequently in the park, especially for 

 autumn effect. J. nigra is a first-rate town 

 tree. It is vigorous in growth, with long 

 branches and graceful foliage, which . in 

 September turns yellow, and is very effec- 

 tive in the landscape. J. regia laciniata, 

 sometimes met with under the names of 

 J. heterophylla and J. filicifolia, although 

 not so vigorous as the type, is in some Fig. 251. — Kerria ja- 

 respects superior to it. It is slower in ponica flore-pleno. 

 growth, and its slightly drooping branches, 



clothed with rich green, deeply-cut leaves, are very handsome. It 

 makes a lovely lawn tree, and fruits freely. J. mandschurica is a 

 very uncommon and handsome Walnut from Amurland. It is 

 hardy, vigorous, and distinct, and yields a plentiful supply of 

 pear-shaped fruits. J. cordiformis, a Japanese species, is equally 

 hardy and well adapted for pleasure-grounds. J, californica and 

 T. Sieboldiana are also deserving of the planter's notice. 



Kerria japonica flore-pleno (Double Jews Mallow) (Fig. 

 251) is a beautiful yellow-flowered shrub, suitable for planting 



