Abies vejarii

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Abies vejarii
Abies vejarii, Los Oyameles, Arteaga, Coahuila 1.jpg

Abies vejarii

Systematics
Order : Conifers (Coniferales)
Family : Pine family (Pinaceae)
Subfamily : Abietoideae
Genre : Firs ( Abies )
Section : Oiamel
Type : Abies vejarii
Scientific name
Abies vejarii
Martinez

Abies vejarii is a species of conifer from the genus of firs ( Abies ). It occurs in two isolated stocks in northern Mexico .

description

Abies vejarii grows as an evergreen tree that can reach heights of growth of up to 40 meters and diameters of up to 1.5 meters at chest height . The branches extend horizontally from the trunk and form a broadly conical to pyramidal crown . Young trees have a smooth gray bark that turns gray-brown with age, roughening and flaking. The bark of the twigs is initially purple-red, later orange-brown. It is hairless, smooth and has a shallow furrow.

The spherical buds are very resinous and are around 2.5 millimeters long and 3 millimeters thick. They consist of keel-shaped bud scales. The needles are 1 to 2.5 inches long and 1.3 to 2 millimeters wide. They are twisted at the base and are arranged in a spiral on the branches. On the underside of the needle there are two wide, whitish colored stomatal bands .

The spherical male cones are reddish in color and around 5 millimeters in size. Its tip is blunt. They stand in groups on the branches. The upright, elongated egg-shaped cones are 6 to 12 inches long and 4 to 6 inches thick. Immature cones are dark purple and ripe dark brown. The seeds are 8 to 10 millimeters long and have a violet-brown wing around 15 millimeters long and around 12 millimeters wide.

Distribution and location

The natural range of Abies vejarii includes two isolated stands in the Sierra Madre Oriental in northern Mexico. These stocks are located in Southeast Coahuila and Nuevo León and West Tamaulipas .

Abies vejarii is a species of cool climate tree with dry summers and humid winters. You can find them at altitudes from 2000 to 3300 meters.

There are mainly mixed stands with different oak and pine species as well as Douglas fir ( Pseudotsuga menziesii ).

Systematics

Abies vejarii is assigned to the Oiamel section and the Religiosae subsection within the genus of firs ( Abies ) . It was first described in 1942 by Maximino Martínez in "Anales del Institutó de Biología de la Universidad Nacional Autonoma de México, Série Biologia", Volume 13 (2), page 629.

Subspecies and varieties

Abies vejarii is mostly divided into two varieties :

  • Abies vejarii var. Macrocarpa Martínez : It occurs in the states of Coahuila and Nuevo León.
  • Abies vejarii var. Vejarii : It occurs in the Sierra Madre Oriental in northeastern Mexico.

In the past, a subspecies was also distinguished:

  • Abies vejarii subsp. mexicana (Martínez) Farjon : It occurs in the Sierra de Santa Caterina , which forms the border between the two states of Coahuila and Nuevo León. You can find them there at altitudes of 2000 to 3000 meters. Abies mexicana Martínez is a synonym . Some authors consider it to be better than the subspecies Abies religiosa subsp. mexicana (Martínez) Strandby, KIChr. & M.Sørensen to Abies religiosa .

Hazard and protection

Abies vejarii is listed on the IUCN Red List as “not at risk”.

swell

  • Christopher J. Earle: Abies vejarii. In: The Gymnosperm Database. www.conifers.org, accessed on March 28, 2011 (English).

Individual evidence

  1. ↑ a b c d e f g Christopher J. Earle: Abies vejarii. In: The Gymnosperm Database. www.conifers.org, accessed on March 28, 2011 (English).
  2. ↑ a b c Abies vejarii. In: TROPICOS. www.tropicos.org, accessed on March 28, 2011 (English).
  3. ↑ a b c d Rafaël Govaerts (Ed.): Abies. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved April 9, 2019.
  4. ↑ Abies vejarii in the endangered Red List species the IUCN 2010. Posted by: Conifer Specialist Group, 1998. Accessed March 28, 2011th

Web links