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Common names:
The tree species Picea
koyamai (variously koyamae)
(Japanese: yatsugatake-to-hi) is commonly
known as Koyama spruce or Koyama's Spruce.
It is native to the mountains on the borders
of Nagano and Toyama Prefectures in central
Honshu, Japan, where it grows at 1500-2000 m
titleitude. It was named after Japanese
botanist Mitsua Koyama.
Koyama spruce is a monoecious evergreen tree
growing to 20 m tall, with a trunk diameter
of up to 1 m. The shoots are orange-brown,
with scattered pubescence. The leaves are
needle-like, 8-16 mm long, rhombic in
cross-section, dark bluish-green with
conspicuous stomatal lines. The cones are
cylindric-conic, 5-10 cm long and 2 cm
broad, maturing pale brown 5-7 months after
pollination, and have stiff, smoothly
rounded scales that are up to 15 mm long and
13-16 mm wide. Flowering takes place from
May to June.
It is occasionally planted as an ornamental
tree. The wood is similar to that of other
spruces, but the species is too rare to be
of economic value. |
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