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Sciadopityaceae

(Family)

Overview

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Trees evergreen, monoecious; branches short, spreading. Leaves dimorphic: scalelike leaves scattered on branchlets or clustered at apex of branchlets, small; connate leaves formed by the complete fusion of two leaves, arising from the axils of scalelike leaves and spreading radially at apex of branchlets, linear, flat, leathery, with a deep furrow both adaxially and abaxially. Pollen cones clustered at apex of branches; microsporophylls numerous, spirally arranged. Seed cones ripening in 2nd year, terminal, shortly pedunculate, with numerous, spirally arranged cone scales; bracts nearly enclosed by cone scales. Seeds 5-9 per scale, ovoid, with a narrow wing. Cotyledons 2. 2n = 20.

One genus and one species: Japan; introduced in China.[1]

Photos

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Taxonomy

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The Family Sciadopityaceae is further organized into finer groupings including:

Genera

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Sciadopitys

The Koyamaki (Sciadopitys verticillata) or Japanese Umbrella-pine, is a unique conifer endemic to Japan. It is the sole member of the family Sciadopityaceae and genus Sciadopitys, a living fossil with no close relatives, and known in the fossil record for about 230 million years. [more]

At least 36 species and subspecies belong to the Genus Sciadopitys.

More info about the Genus Sciadopitys may be found here.

Bibliography

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Footnotes

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  1. Liguo Fu, Yong-fu Yu & Aljos Farjon "Sciadopityaceae". in Flora of China Vol. 4 Page 53. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org.

Sources

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Last Revised: October 03, 2013
2013/10/03 20:31:35