CONIFER. SILVA OF NORTH AMERICA. 125 
Plants of the species can be easily raised from seeds, and the varieties can be propagated by 
cuttings made from young branches. 
Thuya,' the classical name of some coniferous trees, was adopted by Tournefort” and afterward by 
Linneus for this genus. 
which also attack related genera, like Pitya Cupressi, Saccardo, Adanson, Fam. Pl. ii. 480), Thuja (Linneus, Hort. Cliff. 449 
which also occurs on Cupressus thyoides. [1737] ; Spec. 1002), and Thuia (Scopoli, Introduct. 353 [1777]). 
1 Thuya has been written Thya (Rumphius, FV. Jen. 315 [1718]. — 2 Inst. 586, t. 358. 
CONSPECTUS OF THE NORTH AMERICAN SPECIES. 
Evurnuya. Fruit erect, its thin scales mucronulate; seeds compressed, the thin testa produced 
into broad lateral wings. 
Fruit small, with usually four fertile scales ©... ee ee ee ee es 1. T. occIDENTALIs. 
Fruit larger, with usually six fertile seales. . . 1 ee ee ee ee ee ww ee 62, T. GIGANTEA. 
