i8o CONIFEROUS TREES 



T. CANADENSIS, WUdefiow. (Synonym : T. 

 baccata canadensis, Gray.) Canada and North- 

 Eastern States of America. 1800. — A low-growing 

 and far-spreading species, with smaller and lighter 

 coloured leaves, and bearing berries that are much 

 smaller than those of our native species. It is 

 rare in cultivation. 



T. CuspiDATA, Siehold et Zuccarini, Mountains 

 of Japan. About 1855. — An uncommon species, 

 that is at once distinguished by its irregular and 

 open outline, and broad, leathery leaves. It is of 

 no special value for ornamental planting. 



THUYA, Linnceus — including Biota and 

 Thu^^opsis 



THE ARBORVIT^S 



Flowers monoecious ; male catkins oval ; females solitary 

 and terminal. 



Cones small, oblong or globular ; scales thickened upwards, 

 valvate, and from six to ten in number. 



Seeds usually winged, in twos at the base of the lowermost 

 or middle pair of scales. 



Cotyledons two. 



Evergreen trees or shrubs, with appressed leaves and 

 usually oblong cones. The seeds are winged on both sides, 

 except in the old genus Biota, in which this appendage is 

 quite wanting. 



Thuya dolabrata, Linnceus fit. (Synonym : 

 Thuyopsis dolabrata, Siehold et Zuccarini.) Moun- 

 tains of Japan. 1853. — For ornamental planting 

 this conifer holds an important place, its distinc- 

 tive characteristics and the readiness with which 

 it may be cultivated being generally recognised. 

 In this country it forms a handsome conical 

 specimen, with vertical branches and drooping 



