ENUMERATION OF CONIFERS 



289 



2^-3 inches long, 1^-2 inches broad; scales triangular, ovate-lanceolate, 

 cordate at the base, emarginate at the apex, woody; bracts ovate-lanceo- 

 late, much smaller than the scales; seeds about 3^3 inch long. Eastern 

 China. — Introduced to England in 1854 and from there to America in 

 1859. Hardy as far north as 

 Massachusetts. A handsome tree 

 of broad-pyramidal habit clothed 

 with light green feathery foliage 

 turning to golden-yellow in 

 autumn. It is not doing well on 

 limestone soil. 



26. LARIX, MUl. LAKCH 



Deciduous resinous trees with IMf {\\\\^^^''-^^'^-^/Jk 



irregularly whorled spreading ^ \ \l (\^\^^ 



branches and thick furrowed ^\ V^- 



and scaly bark: leaves linear, 

 in crowded clusters on short spurs 

 except on the leading shoots where 



they are spirally arranged: flow- 77. Pseudolarix amabUis. 



ers monoecious; staminate flowers 



small, globose to oblong, solitary, consisting of numerous short-stalked, 

 spirally arranged anthers; fertile flowers larger, consisting of several or 

 numerous scales, each scale with 2 ovules at the base and borne in the axil 

 of a much longer bract: cone with woody, 2-seeded scales, persistent on the 

 axis; seeds with large, thin wings, ripening the first year; cotyledons 6-8, 

 usually 6. (Larix is the ancient Latin name of the larch-tree.) — About 10 

 species in the colder regions and on the high mountains of the northern 

 hemisphere. 



A. Leaves keeled on both sides: bracts of the cones exceeding the 



scales \. L. Potanini 



AA. Leaves flat or rounded above. 



B. Bracts exceeding the scales 2. L. occidentalis 



BB. Bracts shorter than the scales. 



c. Under surface of leaves with 2 wliile bands: cone-scales re- 

 flexed at apex 3. Z,. Kaempferi 



CO. Under surface of leaves without conspicuous white bands, 

 shape very narrow: cone-scales not reflexed at apex. 

 D. Cone-scales pubescent or puberulous on back, 40-50 in 

 each cone: branchlets usually glabrous. 

 E. Scales of cone not incurved at apex, straight; bracts 

 about half as long as scale: leaves up to Ij/^ inches 

 long 4. L. dendua 



T 



