9. Larix olgensis A. Henry, Gard. Chron., ser. 3. 57: 109. 1915.
黄花落叶松 huang hua luo ye song
Larix dahurica Turczaninow ex Trautvetter f. multilepis Liou & Q. L. Wang; L. gmelinii (Ruprecht) Kuzeneva var. olgensis (A. Henry) Ostenfeld & Syrach-Larsen; L. olgensis var. changpaiensis Y. C. Yang & Y. L. Chou f. intermedia (Takenouchi) Yang & Nie; L. olgensis var. changpaiensis f. pubibasis Yang & Nie; L. olgensis f. viridis (E. H. Wilson) Nakai.
Trees to 30 m tall; trunk to 1 m d.b.h.; bark gray to gray-brown, longitudinally fissured, flaking, scaly; crown pyramidal; long branchlets reddish or light brown, initially slightly shining, aging gray or dark gray, 1-1.2 mm in diam., pubescent or glabrous; short branchlets 2-3 mm in diam., densely brownish hairy at apex; winter buds purplish brown, ovoid or conical-ovoid. Leaves 1.5-2.5 cm × ca. 1 mm, keeled abaxially. Seed cones reddish purple or violet, maturing light brown and sometimes tinged with purple, ovoid-oblong. Seed scales 14-16, ovate-quadrangular or quadrangular-orbicular, usually slightly recurved distally when dry, 0.9-1.2 × ca. 1 cm, ± tuberculate, sometimes pubescent, rarely nearly glabrous abaxially, base slightly wider, apex truncate or emarginate, obtuse. Bracts included, dark purple-brown, oblong-ovate, 4-7 mm. Seeds light yellow or white, irregularly purple spotted, subobovoid, ca. 9 mm including wing. Pollination May, seed maturity Sep-Oct.
Mountains, moist slopes, swamps; 500-1800 m. Jilin, E Liaoning [Korea, E Russia]
The timber is used for construction, poles, vehicles, pit props, railway sleepers, and wood fiber. The trunk is used for producing resin and the bark for tannins. The species is also cultivated for afforestation and as an ornamental.