Cupressus macnabiana

Cupressus macnabiana

Cupressus macnabiana is a plant belonging to the family of the cypress family ( Cupressaceae ). It is native to California.

Description

Can Cupressus macnabiana grows as a shrub -like, evergreen tree of stature heights of up to 12 meters and diameter at breast height of more than 1 meter reach. The rough, fibrous bark is furrowed. The dense crown is broadly conical. Go The 0.5 to 1 millimeter thick branches comb-like on the branches. This branch position is unique among the species of cypress in North America.

The scale-like leaves are sometimes dyed blue-green. On the underside of leaves is a striking resin gland.

The male cones are 2-3 mm long and about 2 mm thick. They contain three to five pollen sacs. The cones are spherical shaped with a diameter of approximately 1.5 to 2.5 centimeters. For ripening turns they are colored brown or gray. Each pin consists of six to eight scales. The 2-5 mm long seeds are light to medium brown colored and sometimes have a blue-green tint on.

Distribution and location

The natural range of Cupressus macnabiana located in California. They can be found there on the western slopes of the Sierra Nevada in Amador County, Nevada County and Yuba County. In Lake County and Napa County it grows on the slopes of the inner Coast Ranges. Furthermore, there are deposits in Mendocino County and Shasta County.

Cupressus macnabiana thrives at altitudes 300-850 meters. It grows mainly in forests of foothills and in the undergrowth often Serpentinböden.

System

The first description as Cupressus macnabiana in 1855 by Andrew Murray in Edinburgh Philosophical Journal 1, p 293, pl. 11 Synonyms for the species are Callitropsis macnabiana (A. Murray ) DP Little and Neocupressus macnabiana (A. Murray ) de Laub .. The specific epithet honors the former macnabiana curator of the Royal Botanic Garden Edinburgh, James McNab.

Cupressus macnabiana forms in the Costal Ranges hybrids with Cupressus sargentii. This is the only known natural interspecific hybridisation within the genus of cypresses (Cupressus ).

Threats and conservation

Cupressus macnabiana 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 macnabiana. 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 macnabiana ( this work is the same text online, Cupressus macnabiana - Online).