330 MANUAL OF GARDENING 



Cork elm, U. racemosa* 



Softer in aspect than the last, and more picturesque in winter, having promt 

 nent ridges of bark on its branches; slow grower. 



Red or slippery elm, U. fulva* 



Occasionally useful in a group or shelter-belt ; a stiff grower. 



English elm, U. campestris, and Scotch or wych elm, U. scabra {U. 

 mantana) . 



Often planted, but are inferior to U. Americana for street planting, al- 

 though useful in collections. These have many horticultural forms. 



Non-coniferous trees for the South, 



Among deciduous trees for the region of Washington and 

 south may be mentioned: Acer, the American and European 

 species as for the North; Catalpa hignonioides and especially 

 C. speciosa; celtis; cercis, both American and Japanese; flower- 

 ing dogwood, profusely native; white ash; ginkgo; koelreuteria; 

 sweet gum (liquidambar) ; American linden; tuhp tree; mag- 

 nolias much as for the North; China-berry (Melia Azedarach); 

 Texas umbrella-tree (var. mnhraculiformis of the preceding); 

 mulberries; oxydendrum; paulownia; oriental plane-tree; 

 native oaks of the regions; Robinia Pseudacacia; weeping 

 willow; Sophora Japonica; Sterculia platanifolia; American 

 elm. 



Broad-leaved evergreens of real tree size useful for the South 

 may be found among the cherry laurels, magnolias, and oaks. 

 Among the cherry laurels are : Portugal laurel (Prunus Lusi- 

 tanica), English cherry laurel in several forms (P. Laurocerasus) y 

 and the ''mock-orange" or ''wild orange" (P. Caroliniana). 

 In magnolia, the splendid M. grandiflora is everywhere used. 

 In oaks, the live-oak (Quercus Virginiana, known also as 

 Q. virens and Q. sempervirens) is the universal species. The 

 cork oak {Q, Suher) is also recommended. 



