THUIOPSIS. 319 



Gen. THUIOPSIS. Siebold. The Broad-loaved 

 Arbor-Vitse. 



Flowers, mona3cious, or male and female on the same plant, 

 but separate, solitary, and terminal, the male ones cylindrical 

 catkins, the females somewhat globular. 



Cones, ligneous, sub-globular, and composed of eight or ten 

 valvated, opposite, imbricated scales. 



Scales, wedge-shaped, leathery, valvate, more or less orbi- 

 cular, concave, smooth, and persistent. 



Seeds, five at the base of each scale, orbicular, compressed, 

 and free, with a membranaceous wing on each side. 



Leaves, scale-formed, in opposite cross pairs, regularly and 

 closely imbricated in four rows, flattened on the upper and 

 under surfaces. 



Name, derived from ^ Thuia,' the Arbor- Vitee, and ' opsis,' 

 like, resemblance to the Arbor-Vitae. 



A majestic evergreen tree, found in moist situations in Japan. 



Thuiopsis dolabrata, Siebold, the Hatchet-leaved Arbor-Vitae. 

 Syn. Thuja dolabrata, Thunherg. 

 „ Platycladus dolabrata, Spach. 



Leaves, in four ro^vs, scale-formed decussate, broad, thick, 

 ovate, rounded at the points, and imbricated, convex abovc^ 

 furrowed along the middle, and of a beautiful shining deep 

 green, concave-margined, and silvery-white beneath, with the 

 marginal ones clasping over on each side, and connected at the 

 base with the adpressed flat upper and lower ones to such an 

 extent as to appear on the under side of the branchlet, as one 

 leaf surrounding the branchlet, and three-rowed on both sides, 

 with the two outer ones narrowest and slightly curved inwards 

 at the points, while the centre one is very broad, and quite 

 rounded. Branches vertical, open, and pendulous at the ends. 



