340 



"WEEDS AND USEFUL PLANTS. 



4 anther-cells. Fertile amexts with the scales imbricated^ fixed hy the 

 base, each bearing 2 erect cvu!es, dry and spreading at inafurity. Co- 

 tiji.edons 2. Leaves evergreen, very short, appressed and imbricated on 

 the flattened branches. 



L T. OOSidenta'lis, L. Branches spreading ; leaves clcr,e)y appressed, 

 rounded on the baclv ; cones ovoid-oblong, scales obtuse, pointless. 



Western Thuja. American Arbor- Yitae. 



Stem 20-50 feet high, with a conical top ; young branches 2-edg3d. diverging horizontally. 

 Canes half an inch long, in racemose clusters on the recurved, brauchlets ; scales 1-seeded ; 

 seed broadly winged. 



New England and northwest. 



Obs. This is a native of the cooler parts of the country and is fre- 

 quently cultivat.^d as an ornamental evergreen. In the North it is 

 regarded as a valuable tree for its timber, which is very durable, though 

 difficult to procure of any great length. 



2. T. oriexta'lis, L. Branches erect ; leaves slightly F.ilrate in the 

 middle ; cones roundish-ovoid or obovoid, erect ; scales acute with con- 

 spicuous recurved or spreading points. 



Eastern Thuja. Chinese Arbor-Yitaj. 



stem 10-20 feet high, usnally of a shrub-like habit, with numerous erecf b-anches from 

 near the base — especial!}' when young ; Irandies divergiug vertically or fan-like, wilh the 

 edges up and down. Cones sub-solitary, about half an inch long, deep green aid glaucous. 



Cultivated. Native of China and Japan. 



Obs. This is a much smaller tree than the preceding, it? fdiage and 

 cones of much deeper green. It is often used for an ornamentid hedge ; 

 and it is decidedly better for show than for service. 



5. CUPRES'SUS, Tournef. Cypress. 



[The classical name.] 



Flcu'crs monoecious on diflerent branches, in terminal small /^menfs. 

 Sterile aments of shield-shaped scales bearing 2 -4 anther-cells under 

 the lower margin. Fertile amexts globular, of shield-shaped smies in 

 4 ranks, bearing several erect bottle-shaped ovules. Cones globular, 

 firmly closed, but opening at maturity ; the scales thick and vroody, 

 pointed in the middle ; the few or several narrowly-winged sec\ls at- 

 tached to their base or stalk. Cotyledons 2 - 3. Strong-scented ever- 

 green trees, with very small and scale-like closely appressed imbrr"''.ated 

 leaves and exceedingly durable wood. 



1, C. thyoi'cles, L. Leaves minute, ovate, with a small gland oi 

 back, closely imbricated in 4 rows on the 2-edged branchlets. 



Thuja-liks Cupressus. Y'hite Cedar. 



