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FOC | Family List | FOC Vol. 4 | Pinaceae | Pinus

7. Pinus densiflora Siebold & Zuccarini, Fl. Jap. 2: 22. 1842.

赤松 chi song

Trees to 30 m tall; trunk to 1.5 m d.b.h.; bark orange-red, red-brown, or brown-yellow, flaking and scaly; crown umbrellalike; 1st-year branchlets pale yellow or red-yellow, slightly glaucous, glabrous, white powdery or not; vegetative buds dark red-brown, oblong-ovoid, slightly resinous; scales slightly reflexed at apex. Needles 2 per bundle, twisted or not, semiorbicular in cross section, 5-15 cm × ca. 1 mm, vascular bundles 2, resin canals 3-9, marginal, margin inflexed or not. Seed cones erect or pendulous, shortly pedunculate, dark yellow-brown or brownish yellow, ovoid or ovoid-conical, 3-5.5 × 2.5-4.5 cm, dehiscent at maturity. Seed scales usually thin; apophyses usually appressed, broadly rhombic, flat or recurved at apex, rarely pyramidal and slightly ridged; umbo flat or slightly protruding into a minute spine. Seeds obovoid-ellipsoid or ovoid, 3-7 × ca. 3 mm; wing 1-2 cm × 5-7 mm. Pollination Apr-Jun, seed maturity Sep-Oct of 2nd year.

Coastal regions to mountains, lakesides, rocky hillsides; near sea level to 900 m. E and S Heilongjiang, NE Jiangsu, SE Jilin, Liaoning, E and N Shandong [Japan, Korea, E Russia]

The timber is used for construction, poles, and furniture; the trunk can be used as a source of resin.

1 First-year branchlets not white powdery; needles not or only slightly twisted, 13-15 cm, margin usually inflexed   7c var. zhangwuensis
+ First-year branchlets white powdery; needles twisted, 5-12 cm, margin usually not inflexed.   (2)
2 (1) Seed cones erect; apophyses flat   7a var. densiflora
+ Seed cones pendulous; apophyses ± pyramidal, apex recurved in apophyses toward base of cones   7b var. ussuriensis

Lower Taxa


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