Cupressus sargentii
Cupressus sargentii
Cupressus sargentii is a plant belonging to the family of the cypress family ( Cupressaceae ). It is native to California.
Description
Cupressus sargentii grows as evergreen tree of stature heights of up to 25, but usually only reaches 10 meters. The rough, fibrous bark is furrowed. The open or dense crown is shaped more wide than tall or columnar. The 1.5 to 2.5 millimeters thick branches are decussate on the branches.
The leaves are scale-like shape. On the underside of leaves is an inconspicuous, mostly blue-green gland normally secretes no resin.
The male cones are 3-4 mm long and about 2 mm thick. They contain three to four pollen sacs. The cones are usually spherical shaped 2 to 2.5 inches in diameter. For ripening turns they are colored brown or gray. Each pin usually consists of six to eight scales on which there are few resin bubbles. The 4-6 mm long seeds are dark brown in color and have a weak to strong, blue-green tint on.
Distribution and location
The natural range of Cupressus sargentii is located in the Coast Ranges, in the Santa Lucia Mountains and the San Rafael Mountains in California. They can be found there from the extreme north of Mendocino County and Colusa County in the north to the Lake County is the southern Napa County, as well as the Marin County to Alameda County, the Monterey County, San Luis Obispo County and Santa Barbara County.
Cupressus sargentii is a tree species of the Mediterranean climate. The species thrives in high altitude 200-1100 meters. Where it grows mainly in forests and in the undergrowth, often on Serpentinböden. The annual rainfall is around 600 mm, depending on location.
System
The first description was in 1909 as Cupressus sargentii by Willis Linn Jepson, A Flora of California 1 (1 ), pp. 61 To some extent, the synonyms Callitropsis sargentii ( Jeps. ) DP Little and Neocupressus sargentii ( Jeps. ) de Laub. used for the type.
Cupressus sargentii forms in the Costal Ranges with Cupressus macnabiana hybrids. This is the only known natural interspecific hybridisation within the genus of cypresses (Cupressus ).
Threats and conservation
Cupressus sargentii is " not threatened " on the Red List of IUCN. It is noted, however, that a re-examination of risk is necessary.
Swell
- Template: Internet resource / maintenance / access date not in ISO format Christopher J. Earle: Cupressus sargentii. In: The Gymnosperm Database. www.conifers.org, December 18, accessed on January 5, 2012 ( English).
- Frank D. Watson, James E. Eckenwalder: Cupressaceae. Cupressus. In: Flora of North America Editorial Committee ( eds.): Flora of North America North of Mexico. Pteridophytes and Gymnosperms. Volume 2, Oxford University Press, New York et al 1993, ISBN 0-19-508242-7, Cupressus sargentii ( this work is the same text online, Cupressus sargentii - Online).