07
May
2009
New species of Betula in China
New Species | Magnoliopsida
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Betula fujianensis

Distribution and Habitat - is known only Luoboyan reserve in the province of Fujian. Minimum and maximum temperatures are 7 ˚ C and 40 ˚ C, 1643.2 mm annual sediments. Altura increase of Castanopsis lamontii, Tibetan Castanopsis, Cinnamomum micranthum, Euryale loquitana, Ilex formosana, Phoebe bourne, on granite substrate, pH4.5-5.5. Local tree used for veneer, construction and decorative.

Description - tree, strain 25 m high and 60 cm in diameter. Bark dark gray or gray-brown, longitudinal cracks and is exfoliating. Branches reddish brown or gray-brown, densely glandular Vilo and resin. Petiole 1.5-3.0 cm, densely dotted Vilos resin. Limb leaf-ovat oblong or elliptic, 6-12 x 4.5-6.5 cm, thin, apex cuspidata, caudate, base round or sub-cordata, 8.12 pair of secondary ribs, curved edges iregulat soirees. Male inflorescences arranged on the upper branches or axillary 1.2. Female inflorescences in a Raceme 3.4, pendulum, cylindrical, about 5.5-8.5 cm x 6 mm at maturity, peduncle 5-10 mm, densely white Vilos. Bractei subcordate, sparsely white-pubescent, and Chile, tri-lobate, the side lobes are rounded. Suborbiculara or ovata seed, about 2 x 1-1.5 mm, sparsely pubescent, densely pubescent on top, with membranous wings, three-patru times higher than seed. 2 stigmas persistent. Build in April-May, two weeks earlier than Betula luminifera in the same area.

 

Source www3.interscience.wiley.com

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