Korean cedar, Korean pine; 잣나무 [Korean]; チョウセンゴヨウ chosen-goyo, chosen-matsu [Japanese]; 红松 hong song [Chinese]; Корейский кедр [Russian].
Syn.: Pinus strobus Thunb. 1784 non L., Pinus mandschurica Rupr. 1857, Pinus cembra var. mandschurica (Rupr.) Carr. 1867, Strobus koraiensis (Sieb. et Zucc.) Moldenke 1939, Apinus koraiensis (Sieb. et Zucc.) Moldenke 1952, Pinus prokoraiensis Zhao et al. 1990 (Farjon 1998).
Monoecious, evergreen trees up to 30 m tall and 150 cm dbh. Bark gray-brown, smooth, on larger trees turning gray-black, scaly, peeling. Shoots red-brown, densely puberulent. Cataphylls alternate, imbricate near base of short shoots, red-brown, membranaceous, oblong or linear-oblong, apex obtuse, 5-15 mm long, deciduous. Needles in fascicles of 5 at end of short shoot, 6-13 cm × 1 mm, triangular in transverse section, dark green on outer face, two inner faces whitish green with stomata; resin canals 3, marginal near the angles. Flowers axillary. Pollen cones crowded at base of new shoots, ellipsoid. Female cones crowded near end of new shoots in groups of 1-5, conelets green, ovoid. Cones on a short peduncle, ovoid or cylindric-ovoid, 9-11 × 5-6 cm, green [?]; scales woody, broadly rhomboid, ca. 2.5 cm long and wide, green on upper half, brown on lower half, apex with recurved spiny boss [apophysis?]. Seeds large, thickly triangular-obovoid, wingless, ca. 15 mm long, 10 mm across, 7 mm thick. Flowers in May, cones mature in October of the following year. 2n = 24 (Iwatsuki et al. 1995). See also, Wu and Raven (1999).
NE Korea, Japan: C. Honshu southward from Tochigi Pref. and northward from Gifu Pref.) and Shikoku; the Ussuri River basin in China: Heilongjiang and Russia. In subalpine forests at elevations of 1300-2500 m (Iwatsuki et al. 1995). Ecologically similar to P. sibirica (Vladimir Dinets e-mail 1998.01.10). Hardy to Zone 3 (cold hardiness limit between -39.9°C and -34.4°C) (Bannister and Neuner 2001).
A specimen 42 m tall occurs in the Ussuri Nat. Res. (Vladimir Dinets e-mail 1998.01.10).
Siebold, P.F. von and J.G. Zuccarini. 1842. Flora Japonica sive plantae, ... Leiden. Vol. 2(3), p. 28, t. 116.
Last Modified 2012-11-28