EVERGREEN TREES AND SnRUBS. 109 



Arbor Vitae (var. glohosa), dense, and globular, H. Hack- 

 er's Arbor Vitse (var. Hackerii), of dwarf liabit, witli 

 very dark foliage, ff. Hoopes' Dwarf Arbor VitfB (var. 

 7iana), of conical form, and very compact in its growth, 

 //. Dwarf Round-headed Arbor Vitae (var. rotundata), 

 very dwarf ; deep green, with a crested appearance, //. 

 The variety Tom Thumb is a miniature variety, of slow 

 growth, with sharp-pointed, dark-green leaves, valuable 

 for bold edgings or low hedge, //. 



The Retinisporas, or Japaxese Arbor ViTiE, also 

 known as the Japan Cypress, are among the handsomest 

 and most easily grown evergreens in cultivation. Some 

 of them are rather tender, but the hardier ones will 

 thrive over nearly the entire country, and possess such 

 positive excellence, as to be worthy of frequent use. 



The Plume-like Eetinispora {T. Plumosa) is one 

 of the hardiest species ; a rapid grower, with pretty, 

 small, bright-green leaves, and short, slender branches, 

 G. There are several varieties of this. The Silver-spot- 

 ted Retinispora (var. argentea) has the 3'oung shoots 

 sprinkled with silvery white. The Golden-tipped Retin- 

 ispora (var. aiirea) has a bright golden hue at the ends 

 of the branches; one of the hardiest, //. 



The Obtuse-leaved Retinispora {T. ohtusa) is of 

 remarkable beauty, and one of the hardiest ; leaves 

 glossy-green above and silvery-white beneath, A. 



The Pea-fruited Retinispora {T. pisifera) is of 

 small size and slender habit, with sharp-pointed, greon 

 leaves. There are several dwarf varieties of this last 

 named spocies. 



Tlie Thread-branched Retinispora {\i\i\ filifera), 

 of elegant pyramidal form, with the ends of tlie shoots 

 drooping gracefully; bright-green foliage. The Golden 

 Thread-branched Retinispora (var. aurca), with the 

 branches of a beautiful golden color. The Heath-like 



