Jalisco juniper
| Jalisco juniper | ||||||||||||
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| Juniperus jaliscana | ||||||||||||
| Martínez |
The Jalisco-juniper ( Juniperus jaliscana ) is a plant from the family of the cypress family (Cupressaceae). It is native to Mexico.
description
The Jalisco juniper grows as an evergreen tree that can reach heights of up to 10 meters. The branches rise from the straight trunk and form a conical or round crown . The tips of the branches are very flexible and usually curved. The top branches extend from the branches at an angle of 50 to 60 degrees. The fibrous, gray-brown trunk bark becomes 1 to 2 centimeters thick and is divided into interconnected strips. There is a cinnamon-brown layer of bark under the bark . The scaly bark of the branches is colored reddish brown.
The scale-like, green leaves are egg-shaped with a length of 0.7 to 1 millimeter. There is a resin gland in the middle of the leaf. The tip of the leaves is blunt and the leaf edges are finely serrated. The leaves are opposite, rarely alternate on the branches.
The soft and fleshy berry cones are irregularly shaped with a diameter of 7 to 8 millimeters and have a straight stem. When ripe they are slightly shiny reddish brown in color. Each cone bears two to eleven seeds. The seeds have several resin pits and are angular-egg-shaped with a length of 3 to 4 millimeters and a width of about 2 millimeters.
Distribution and location
The natural range of the Jalisco juniper is in Mexico in the Sierra Madre Occidental . It includes the communities of El Puerto de las Víbroras , Bosques de San Francisco and Pueblo Nuevo in the south of Durango . In the northwest of Jalisco it can be found in the hills around Cuale .
The Jalisco juniper thrives at altitudes of 1335 to about 2670 meters. It grows in mountain forests where it forms mixed stands with different types of juniper ( Juniperus ), pine ( Pinus ) and oak species ( Quercus ).
Systematics
It was first described as Juniperus jaliscana by Maximino Martínez in 1946 in Anales del Institutó de Biología de la Universidad Nacional Autonoma de México, Series Biologia 17 , Volume 1, page 69.
Hazard and protection
The Jalisco Juniper is classified as "Endangered" in the IUCN Red List . Heavy logging in the forests is cited as the main risk factor. It is pointed out, however, that a new review of the hazard is necessary.
swell
- Christopher J. Earle: Juniperus jaliscana. In: The Gymnosperm Database. www.conifers.org, December 12, 2010, accessed on August 25, 2012 .
Individual evidence
- ↑ a b c d e Christopher J. Earle: Juniperus jaliscana. In: The Gymnosperm Database. www.conifers.org, December 12, 2010, accessed on August 25, 2012 .
- ↑ a b Juniperus jaliscana in the endangered Red List species the IUCN 2012. Posted by: Conifer Specialist Group, 1998. Accessed August 25, 2012th
- ↑ Juniperus jaliscana at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed August 25, 2012.