THE WHITE CEDAE. 71 



Scales, mostly seven in number, oblong or rounded, shield- 

 shaped, and in alternate opposite pairs. 



Seeds, convex, a little flattened on one side, hard sheUed, in 

 sunken grooves, two at the base of each scale, and either 

 ■wingless or very sHghtly furnished with rudimentary ones. 



Leaves, scale-formed, in opposite pairs, four rowed, with a 

 sunken groove or gland on the back, glaucous and persistent. 



Seed-leaves, in twos. 



Jtifame, derived from " Chamse," ground, and " Cyparis," the 

 Cypress — the ground or swamp Cypress. 



An evergreen tree, found in North America. 



No. 1. Cham^cypaeis SPHiEROiDEA, Spach, the White Cedar. 



Syn. Cupressus thyoides, Linnceus. 



,, nana-mariana, Pluknet. 



„ Thuja sphseroidea, Hort. 

 „ „ sphseroidalis, Richard. 



Leaves in four rows, regularly imbricated, ovate-pointed, and 

 in opposite pairs, seldom spreading at the points, but always 

 in straight lines, of a bright glaucous green, and with a large 

 transparent gland on the back rib. Stem bushy, branching to 

 the ground, particularly on young plants. Branches horizontal, 

 somewhat pendulous, and densely covered at the points, with 

 numerous small branchlets. Branchlets crowded, compressed, 

 long, regularly forked, frequently bent downwards, and covered 

 with small scale-formed leaves. Cones very small, globular, 

 numerous, clustered together, and about the size of a small 

 pea, green when young, but of a glaucous blue or brown colour 

 when ripe. Scales mostly seven in number, shield-shaped, 

 four or five-sided, in opposite alternate pairs, with the odd ter- 

 minal one the largest, each having a slightly elevated, broad, 

 flat point in the centre, and covering two small round slightly 

 winged seeds at their base in sunken grooves. 



A tail evergreen tree, growing 70 or 80 feet high, and three 

 feet in diameter. 



