The Hainan White Pine or Fenzel's Pine (Pinus fenzeliana) is a tree restricted to the island of Hainan off southern China. This pine reaches heights of 20 m with a trunk 1m in diameter.
The needles are in fascicles of five, and 5-13 cm long. The cones are 6-11 cm long, with thick, woody scales; the seeds are large, about 8-15 mm long, with a vestigial 3 mm wing, similar to the related Chinese White Pine (Pinus armandii). Hainan White Pine differs from that species in the shorter needles, smaller cones, and in being adapted to a subtropicalrainforest habitat.
A pine from the Dabie Shan mountains in Anhui, eastern China, first described as a species Pinus dabeshanensis, is occasionally treated as a variety of this species, but more commonly as a variety of Pinus armandii, which it more closely resembles.
Reports of Pinus fenzeliana from Vietnam have not been verified; trees in this area have proved to be either Vietnamese White Pine (Pinus dalatensis) or Guangdong White Pine (Pinus wangii), which both differ markedly in cone and seed size & shape, though similar in foliage.
Pines are mostly monoecious, having the male and female cones on the same tree, though a few species are sub-dioecious with individuals predominantly, but not wholly, single-sex.
Monterey Pine, Pond Pine), the seeds are stored in closed ("serotinous") cones for many years until a forest fire kills the parent tree; the cones are also opened by the heat and the stored seeds are then released in huge numbers to re-populate the burnt ground.
Pines are commercially among the most important of species used for timber in temperate and tropical regions of the world.
Relative susceptibility of whitepines of the Cembrae and Strobi subsections of the Subgenus Strobus to Cronartium ribicola.
In both western and eastern whitepines resistant trees are found that have withstood heavy onslaught of the rust in the highest hazard zones of the northern Lake States and northern Idaho.
Susceptibility of Whitebark pine to Blister Rust in the Pacific Northwest.
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