Supplementary information

Native to southeastern United States, widely planted in country side for afforestation. Needlelike leaves 2 or 3 in a bundles, base enclosed by persistent sheath. Pollen cones borne in spikelike clusters at base of 1st-year branchlets. Seed cones solitary or paired, with 3 cm peduncle, pale brown., ovoid or ovoid-cylindric when open, (7-)9-18(-20) cm, Apophyses lustrous, slightly raised, strongly cross keeled; umbo depressed-pyramidal, with a short, stout prickle. Seeds dark brown, ellipsoid, 6-7 mm, apex oblique; wing to 2 cm.

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References

1. Flora of Hong Kong: Agriculture, Fisheries and Conservation Department, Government of the Hong Kong Special Administrative Region

2. Flora of Guangdong: Guangdong Science and Technology Press

3. Flora of China. Vol 9 (2003): Science Press, Beijing Missouri Botanical Garden Press, St. Louis

4. Flora Republicae Popularis Sinicae (中國植物志): Science Press, Beijing