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Alnus japonica,
a deciduous tree, 10-20m in height and 10-60cm in diameter, with
purple-brown bark, inhabits wetlands or sloughs where the
underground water level is high, characterized by smooth, brown
branches. Leaves are alternate; blades are 5-13cm in length, 2-5.5cm
in width, ovate-like oblong, with pointed tips, bases cuneate, and
uneven shallow serrations on margins. Flowers are monoecious; bloom
before leaves develop in April or November; male inflorescences, 2-5
in number, each 4-7cm long, with petioles, set themselves drooping
at branch ends. Females, 3-3cm, with petioles, 1-5 in number, come
below the males. Bloom time: November in warm areas, April in cold
regions. |
Wild plants in and around Shimane
島根とその周辺の野生植物
