Juniperus pseudosabina
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| Fish. & CAMey. |
Juniperus Pseudosabina is a plant from the family of the cypress family (Cupressaceae). It isnative tocentral Asia .
description
Juniperus pseudosabina grows as an evergreen , upright or prostrate shrub or small tree that can reach heights of up to 12 meters. The tightly standing twigs usually go straight from the branches and have a square or pencil-shaped cross-section.
Both needle-shaped and scale-like leaves are formed. Above all, seedlings and young trees have needle-shaped leaves which are cross-opposite or in whorls of three on the branches. They are 4 to 8 millimeters long and have a pointed tip. The scale sheets are diamond-shaped with a length of 1.5 to 2 millimeters and have a flat or free-standing, blunt tip. The elongated or broadly line-shaped gland on the underside of the leaf is located in the middle of the scale sheets and at the base of the needles.
Juniperus pseudosabina is dioeciously segregated ( diocesan ). The male cones are egg-shaped to approximately spherical with a length of about 2 to 3 millimeters. They contain six to eight microsporophylls , which carry two to three pollen sacs . The female cones are egg-shaped to broadly egg-shaped with a length of 0.7 to 1.4 centimeters and a thickness of 0.6 to 1 centimeter. At maturity they are bluish black to brownish black and have blue-green frosting. Each cone carries a slightly compressed seed. The furrowed seeds are egg-shaped with a length of 6 to 7 millimeters and a width of 4 to 6 millimeters. Their base is pointed or rounded and their tip is blunt.
The number of chromosomes is 2n = 22.
Occurrence
The natural range of Juniperus pseudosabina extends from southeast Kazakhstan , Uzbekistan , northern Afghanistan and Pakistan in the west through Kyrgyzstan , Tajikistan , the south of Siberia and the Chinese Xinjiang to the west of Mongolia in the east.
Juniperus pseudosabina thrives at altitudes of 2000 to 4000 meters, especially in thickets in mountainous areas.
Systematics
It was first described as Juniperus pseudosabina in 1842 by Friedrich Ernst Ludwig von Fischer and Carl Anton von Meyer in Index Seminum [St. Petersburg] 8 , page 15. Synonyms for Juniperus pseudosabina Fisch. & CAMey. are Juniperus centrasiatica Kom. and Sabina pseudosabina (Fisch. & CAMey.) WCCheng & WTWang .
The species Juniperus pseudosabina can be divided into up to two varieties :
- Juniperus pseudosabina var. Pseudosabina is the nominate form and only grows as a shrub.
- Juniperus pseudosabina var. Turkestanica (Kom.) Silba grows both as a tree and as a shrub. A synonym is Juniperus turkestanica Kom.
Danger
Juniperus pseudosabina is classified as "not endangered" in the IUCN Red List . It is pointed out, however, that a new review of the hazard is necessary.
swell
- Christopher J. Earle: Juniperus pseudosabina. In: The Gymnosperm Database. www.conifers.org, November 28, 2012, accessed December 23, 2012 .
- Liguo Fu, Yong-fu Yu, Robert P. Adams & Aljos Farjon: Cupressaceae . Juniperus. In: Wu Zhengyi, Peter H. Raven & Hong Deyuan (eds.): Flora of China . Cycadaceae through Fagaceae. Volume 4. Science Press and Missouri Botanical Garden Press, Beijing and St. Louis 1999, ISBN 0-915279-70-3 , Juniperus pseudosabina , pp. 77 (English, Juniperus pseudosabina - online - this printed work is online with the same text).
Individual evidence
- ↑ a b c d e f g Liguo Fu, Yong-fu Yu, Robert P. Adams & Aljos Farjon: Cupressaceae . Juniperus. In: Wu Zhengyi, Peter H. Raven & Hong Deyuan (eds.): Flora of China . Cycadaceae through Fagaceae. Volume 4. Science Press and Missouri Botanical Garden Press, Beijing and St. Louis 1999, ISBN 0-915279-70-3 , Juniperus pseudosabina , pp. 77 (English, Juniperus pseudosabina - online - this printed work is online with the same text).
- ↑ a b c Juniperus pseudosabina at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed August 10, 2016.
- ↑ Juniperus pseudosabina. In: Germplasm Resources Information Network. www.ars-grin.gov, accessed on December 23, 2012 (English).
- ↑ a b Juniperus pseudosabina in the endangered Red List species the IUCN 2012. Posted by: Conifer Specialist Group, 2000. Accessed December 23, 2012 found.