Cupressus goveniana
Cupressus goveniana
Cupressus goveniana is a plant belonging to the family of the cypress family ( Cupressaceae ). It is native to the west of California.
Description
Cupressus goveniana grows as evergreen shrub or small tree of the plant height of 10 meters, in Außnahemfällen can even reach up to 50 meters. The dense to sparse crown is spherically shaped to columnar. The fibrous bark has a smooth or rough surface is furrowed and irregularly. The 1 to 1.5 millimeters thick branches are decussate on the branches.
The leaves are scale-like shape. On the underside of leaves sometimes is an embedded gland that produces no resin.
The male cones are 3-4 mm long and 1.5 to 2 millimeters thick. They contain three to six pollen sacs. The cones are spherical shaped with a diameter of 1 to 3 centimeters. At maturity, they are grayish brown in color. Each pin consists of three to five scales pairs. The dark brown to jet-black seeds have sometimes on a blue-green tint and are 3-5 millimeters in size.
Distribution and location
The natural range of Cupressus goveniana located in Western California. They can be found there on the northern coast, in the Santa Cruz Mountains and on the Monterey Peninsula. The entire collection consists of around 15 separate sub-populations of which comprises no more than 250 trees.
Cupressus goveniana thrives at altitudes 60-800 meters. It grows mainly in coastal pine forests on poor soils.
System
The first description was in 1849 as Cupressus goveniana by George Gordon in the Journal of the Horticultural Society of London 4, p 295 Some authors is the species as a synonym for Callitropsis goveniana ( Gordon) DP Little and Neocupressus goveniana ( Gordon) de Laub. considered.
The species is divided depending on the author in up to three varieties. Some of these are regarded as subspecies:
- Cupressus goveniana var abramsiana ( Gordon) D. P. Little. This variety is found in the Santa Cruz Mountains. A synonym is Cupressus abramsiana C. B. Wolf.
- Cupressus goveniana var goveniana. This variety is native to the Monterey County and on the coast of Mendocino County.
- Cupressus goveniana var pigmaea Lemmon. This variety is found in Mendocino County and on the northwest coast of Sonoma County. A synonym is Cupressus pigmaea ( Lemmon ) coffin ..
Threats and conservation
Cupressus goveniana is in the IUCN Red List as "vulnerable" out. The variety abramsiana is listed as " critically endangered ". The main hazard reasons, the local pressure can be called by the construction of settlements and agriculture, as well as further forest fires and competition from introduced species. It is used in two entries 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 goveniana. In: The Gymnosperm Database. www.conifers.org, December 19, accessed on January 2, 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 goveniana ( this work is the same text online, Cupressus goveniana - Online).