WAHLENBERGIA. [Campanulaceae.] Hardy or half- 

 hardy perennials and annuals. The latter should be 

 sown in heat in March, and potted or planted out to flower ; 

 the former increase by division or seeds. Soil, sandy loam. 



WALL-CRESS. See ARABIS. 



WALLFLOWER. See CHEIRANTHUS. 



WALNUT. See JUGLANS. 



WATER-LILY. See NYMPH^EA. 



WATER-PLANTAIN. See ALISMA. 



WATER-REED. See ARUNDO. 



WEIGELA. [Caprifoliaceae.] Very handsome hardy de- 

 ciduous shrubs. They are free-growing, striking readily from 

 cuttings or from layers, and grow vigorously in good garden 

 soil. The blossoms, at first white, but changing to rose- 

 pink, are produced, generally in great profusion, in spring. 



W. amabilis (loVely) ; hardy shrub ; 3 feet ; flowers pink, in 

 May; Japan; 1852. W. rosea (rosy); hardy shrub; 3 feet; 

 flowers pink, in May; China; 1844. W. Middendorffiana ; 

 hardy shrub ; flowers white, shading to pale-yellow, spotted with 

 carmine ; south of Russia ; 1856. 



There are other species, and a variety with variegated 

 foliage. 



WASHINGTONIA. [Coniferae.] A magnificent hardy ever- 

 green tree. Soil, loam. Increased by seeds. This tree 

 will survive as far north as Massachusetts. 



W. gigantea (gigantic) ; hardy evergreen tree ; 200 feet ; flow- 

 ers deep purple, in July ; California ; 1844. 



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