Juniperus saltillensis
| Juniperus saltillensis | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Juniperus saltillensis | ||||||||||||
| MT Hall |
Juniperus Saltillensis is a plant from the family of the cypress family (Cupressaceae). It is native to northern and central Mexico.
description
Juniperus saltillensis grows as an evergreen shrub that can reach heights of up to 7 meters. The multi-stemmed shrub branches directly on the ground or just above it. The crown is wider than it is high. The branches are bent or pendulous at their ends. The dense twigs come off the short branches. The whitish-gray bark peels off in long, thick, scaly strips and has a red-brown inner bark . The bark of the branches is gray in color.
The light grayish-green scale leaves are usually arranged opposite or cross-opposite and usually do not overlap one another. The leaves on the upper branches are 1 to 2 millimeters long and have a pointed to rounded upper end. The edge of the leaf is densely provided with irregular small teeth. In the middle of the underside of the leaf there may be a flat-egg-shaped gland . The leaves at the branch ends are 3 to 6 millimeters long and have a 1.5 to 4 millimeter long, linear, tear-shaped, raised gland on the underside of the leaf.
Juniperus saltillensis is dioecious, separate sexes ( dioecious ), although monoecious single sexed ( monoecious ) specimens can occasionally also occur. The male cones reach a length of 2 to 3.5 millimeters and contain eight to twelve triangular microsporophylls and three to four microsporangia . The female berry cones are egg-shaped with a length of 5 to 7 millimeters and a thickness of 4.5 to 8 millimeters. They ripen within a year and then change color from initially wine-red to shiny whitish-blue. The berry cones are fibrous and very resinous.
Distribution and location
The natural range of Juniperus saltillensis is in northern and central Mexico and includes the states of Chihuahua , Coahuila , Nuevo León and Zacatecas .
Juniperus saltillensis thrives at altitudes of 1800 to 2900 meters, especially on mountain slopes on shallow, stony soils that have formed on limestone . The species often forms mixed stands with the alligator juniper ( Juniperus deppeana ), Juniperus flaccida and with Pinus cembroides .
Systematics
The first description as Juniperus Saltillensis was made in 1971 by Marion Trufant Hall in Fieldiana, Botany , Volume 34, Number 4, page 45. A synonym for Juniperus Saltillensis M.T.Hall is Juniperus ashei var. Saltillensis (MTHall) Silba .
Danger
Juniperus saltillensis 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 saltillensis. In: The Gymnosperm Database. www.conifers.org, November 23, 2012, accessed December 25, 2012 .
- Marion T. Hall: A new species of Juniperus from Mexico . In: Fieldiana . Botany. tape 34 , no. 4 . Field Museum of Natural History, August 31, 1971, p. 45–53 (English, biodiversitylibrary.org [accessed December 26, 2012]).
Individual evidence
- ^ A b c d Marion T. Hall: A new species of Juniperus from Mexico . In: Fieldiana . Botany. tape 34 , no. 4 . Field Museum of Natural History, August 31, 1971, p. 45–53 (English, biodiversitylibrary.org [accessed December 26, 2012]).
- ↑ a b Christopher J. Earle: Juniperus saltillensis. In: The Gymnosperm Database. www.conifers.org, November 23, 2012, accessed December 25, 2012 .
- ↑ Juniperus saltillensis at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed December 25, 2012.
- ↑ Juniperus saltillensis in the endangered Red List species the IUCN 2012. Posted by: Conifer Specialist Group, 1998. Accessed December 25, 2012 found.