Diselma Genus (chestnut pine)

1 Species

Diselma archeri (syn. Fitzroya archeri (Hook.f.) Benth. & Hook.) is a species of plant of the family Cupressaceae and the sole species in the genus Diselma. It is endemic to the alpine regions of Tasmania's southwest and Central Highlands, on the western coast ranges and Lake St. Clair, at altitudes ranging from 3,000 to 4,000 feet (910 - 1,220 m) above sea level.

It is a dioecious shrub or, rarely, a small tree, growing to mature heights of 3 to 20 feet (1 - 6 m) tall. The leaves are scale-like, measuring 0.08 to 0.12 inch (2 - 3 mm_ long, arranged in four ranks in opposite decussate pairs. The seed cones are among the smallest of any conifer, measuring 0.08 to 0.12 inch (2 - 3 mm) long, green at first, ripening brown in about 7 to 8 months after pollination, and have four seed scales arranged in two opposite pairs, each scale bearing a short bract; the upper pair of scales bearing two small winged seeds.

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