Juniperus taxifolia
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Juniperus taxifolia is a plant from the family of the cypress family (Cupressaceae). It is native to two archipelagos belonging to Japan.
description
Juniperus taxifolia grows as an evergreen shrub or small tree with heights of 1 to 3 (rarely up to 13) meters. The branches go straight or ascending from the trunk. The ascending branches have a dull brown, hairless bark .
The awl, needle-shaped leaves stand in threes with a length of 0.7 to 1.4 centimeters and a width of 1 to 1.5 millimeters. The top is blunt. The top of the needle has a green serrated midrib and two white stomatal ligaments , while the underside of the needle is light green and weakly serrated.
Juniperus taxifolia is dioecious ( dioecious ). The flowering period extends from February to March and the seeds ripen in January to February of the third year. The yellowish-green male cones are elliptical in shape with a length of 3 to 4 millimeters and a thickness of around 2 millimeters. The cones, which are short-stalked, berry-shaped and densely covered with small scale leaves, are spherical and have a diameter of 8 to 9 millimeters. Initially, the cones are green in color, they turn purple-brown as they ripen. Each cone bears three seeds. The seeds are keeled and egg-shaped with a length of around 5 millimeters. The cross section is triangular.
The number of chromosomes is 2n = 22.
Distribution and location
The natural range of Juniperus taxifolia is in Japan. There the species occurs on the Ogasawara Islands and the Ryūkyū Islands . It has run wild on Honshu .
Juniperus taxifolia thrives from almost sea level to an altitude of 300 meters. The species grows from the sea coast to inland in sunny locations on gravelly and stony soils.
use
The species is planted locally as a windbreak. It is also used as an ornamental wood.
Systematics
It was first described as Juniperus taxifolia in 1838 by William Jackson Hooker and George Arnott Walker Arnott in The Botany of Captain Beechey's Voyage , Volume 6, Page 271. A synonym for Juniperus taxifolia is Juniperus lutchuensis Koidz.
Two varieties can be distinguished:
- Juniperus taxifolia var. Lutchuensis (Koidz.) Satake : It occurs from the southern Honshū to the Ryūkyū Islands .
- Juniperus taxifolia var. Taxifolia : It occurs on the Ogasawara Islands .
Hazard and protection
Juniperus taxifolia is listed as not endangered on the IUCN Red List . An evaluation is considered necessary due to the insufficient data situation. However, the stock is considered stable.
swell
- Christopher J. Earle: Juniperus taxifolia. In: The Gymnosperm Database. www.conifers.org, December 12, 2010, accessed January 10, 2012 .
literature
- Robert P. Adams: Junipers of the World: The genus Juniperus . 2nd Edition. Trafford Publishing Co., Vancouver 2008, ISBN 978-1-4251-6880-3 , pp. 302-303 .
Individual evidence
- ↑ a b c d e Christopher J. Earle: Juniperus taxifolia. In: The Gymnosperm Database. www.conifers.org, December 12, 2010, accessed January 10, 2012 .
- ↑ a b Juniperus taxifolia at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed August 9, 2016.
- ↑ Juniperus taxifolia. In: Germplasm Resources Information Network. www.ars-grin.gov, accessed on January 10, 2012 (English).
- ↑ a b c Juniperus taxifolia in the Red List of Threatened Species of the IUCN 2011. Posted by: S. Bachman (RBG Kew), A. Farjon (RBG Kew), M. Gardner (RBG Edinburgh), P. Thomas (RBG Edinburgh) , D. Luscombe (Forestry Comm. Bedgebury), C. Reynolds (Forestry Comm. Bedgebury), 2007. Retrieved January 10, 2012.
- ↑ a b Rafaël Govaerts (ed.): Juniperus. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved March 26, 2019.