14. Pinus palustris Miller, Gard. Dict., ed. 8. Pinus no. 14. 1768.
长叶松 chang ye song
Pinus australis F. Michaux; P. longifolia Salisbury.
Trees to 45 m tall; trunk to 1.2 m d.b.h. in native range; bark orange-brown, with coarse, oblong, scaly plates; crown rounded; branches spreading-descending, upcurved at tips; branchlets orange-brown, aging darker brown, stout, rough; winter buds silvery white, ovoid, 3-4 cm, scales fringed at margin. Needles spreading-recurved, (2 or)3 per bundle, yellow-green, slightly twisted, 20-45 cm × ca. 1.5 mm, stomatal lines present on all surfaces, base with persistent sheath 2-2.5(-3) cm, margin finely serrulate. Seed cones solitary or paired toward branchlets tips, sessile or rarely shortly pedunculate, dark brown, ovoid-cylindric when open, 15-25 cm, maturing in 2 years, then quickly shedding seeds and falling. Apophyses dull, nearly rhombic, slightly thickened and raised, strongly cross keeled; umbo broadly triangular, with a short, stiff, reflexed prickle. Seeds pale brown, mottled darker, truncate-obovoid, ca. 1 cm; wing 3-4 cm.
Cultivated. Fujian, Jiangsu, Jiangxi (Lu Shan), Shandong (Qingdao Shi), Zhejiang [native to SE United States]