Cupressus macnabiana
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Cupressus macnabiana |
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| A. Murray up |
Cupressus macnabiana (Syn .: Hesperocyparis macnabiana (A.Murray to) Bartel ) is a plant from the family of the cypress family (Cupressaceae). It is native to California.
description
Cupressus macnabiana grows as a shrub-like, evergreen tree that can reach heights of growth of up to 12 meters and diameters of more than 1 meter at breast height . The rough, fibrous bark is furrowed. The dense crown is broadly conical in shape. The twigs, 0.5 to 1 millimeter thick, emerge from the branches like a comb. This branch is unique among the cypress species in North America.
The scale-like leaves are sometimes blue-green in color. There is a noticeable resin gland on the underside of the leaf .
The male cones are 2 to 3 millimeters long and around 2 millimeters thick. They contain three to five pollen sacs . The cones are spherical with a diameter of around 1.5 to 2.5 centimeters. As they ripen, they are colored brown or gray. Each cone consists of six to eight scales. The 2 to 5 millimeter long seeds are light to medium brown in color and sometimes have a blue-green tint.
The number of chromosomes is 2n = 22.
Distribution and location
The natural range of Cupressus macnabiana is in California. They are found there on the western slopes of the Sierra Nevada in Amador County , Nevada County and Yuba County . It grows on the slopes of the Inner Coast Ranges in Lake County and Napa County . There are also deposits in Mendocino County and Shasta County .
Cupressus macnabiana thrives at altitudes of 300 to 850 meters. It grows mainly in the forests of mountain foothills and in the undergrowth often on serpentine soils .
Systematics
The first description as Cupressus macnabiana was in 1855 by Andrew Murray up in Edinburgh Philosophical Journal 1, p. 293, pl. 11 . Synonyms for the species are Callitropsis macnabiana (A. Murray bis) DP Little , Neocupressus macnabiana (A. Murray bis) de Laub. or Hesperocyparis macnabiana (A. Murray bis) Bartel . The specific epithet macnabiana honors the former curator of the Royal Botanic Garden Edinburgh , James McNab.
Cupressus macnabiana forms hybrids with Cupressus sargentii in the Costal Ranges . This is the only known, natural cross of species within the genus of the cypress ( Cupressus ).
Hazard and protection
Cupressus macnabiana is listed on the IUCN Red List as "not endangered". It is pointed out, however, that a new review of the hazard is necessary.
swell
- Christopher J. Earle: Cupressus macnabiana. In: The Gymnosperm Database. www.conifers.org, December 18, 2011, accessed January 5, 2012 .
- Frank D. Watson, James E. Eckenwalder: Cupressaceae . Cupressus . In: Flora of North America Editorial Committee (Ed.): Flora of North America North of Mexico . Pteridophytes and Gymnosperms. Volume 2. Oxford University Press, New York a. a. 1993, ISBN 0-19-508242-7 , Cupressus macnabiana (English, Cupressus macnabiana - online - this work is online with the same text).
Individual evidence
- ↑ a b c d e f Christopher J. Earle: Cupressus macnabiana. In: The Gymnosperm Database. www.conifers.org, December 18, 2011, accessed January 5, 2012 .
- ↑ a b Cupressus macnabiana at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed August 9, 2016.
- ^ Rafaël Govaerts (ed.): Cupressus. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved March 25, 2019.
- ^ Frank D. Watson, James E. Eckenwalder: Cupressaceae . Cupressus . In: Flora of North America Editorial Committee (Ed.): Flora of North America North of Mexico . Pteridophytes and Gymnosperms. Volume 2. Oxford University Press, New York a. a. 1993, ISBN 0-19-508242-7 , Cupressus macnabiana (English, Cupressus macnabiana - online - this work is online with the same text).
- ↑ Cupressus macnabiana in the endangered Red List species the IUCN 2011. Posted by: Conifer Specialist Group, 1998. Accessed January 5, 2012 Design.
