East American larch

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East American larch
East American larch (Larix laricina)

East American larch ( Larix laricina )

Systematics
Class : Coniferopsida
Order : Conifers (Coniferales)
Family : Pine family (Pinaceae)
Subfamily : Laricoideae
Genre : Larches ( Larix )
Type : East American larch
Scientific name
Larix laricina
( Du Roi ) K. Koch

The eastern larch or larch ( Larix laricina ), by the English name Eindeutschung also Tamarack larch or Tamarack called, is a plant from the genus of the larch ( Larix ) in the family of Pinaceae (Pinaceae).

distribution

It originally comes from northern North America , mainly Canada , Yukon , Northwest Territories , eastern Newfoundland , but also from the northeastern United States such as Minnesota and Pennsylvania . There is also an isolated population in Alaska .

It is seldom grown in Central Europe .

description

The East American larch grows as a deciduous tree that reaches heights of over 20 meters and trunk diameters ( breast height diameter ) of up to 60 centimeters. Their treetop is slender, conical; towards the tip it usually ends by dividing into several branches. The bark of young trees is gray and smooth, later it is reddish to reddish-brown and flakes off finely without cracks. The bark of the branches is orange-brown and smooth. The needle-shaped leaves standing on short shoots are very narrow (0.5 to 0.8 mm), 0.3 to 0.5 millimeters thick and about 1 to 2.5 centimeters long.

The East American larch is single-sexed ( monoecious ). The pollen has a diameter of 53 to 65  µm . The cones , standing on curved, 2 to 5 × 2 to 2.5 mm large stems, are obtuse cylindrical and only 1 to 2 cm long with a diameter of 0.5 to 1 cm. They have 10 to 30 seed scales and only a few round, at the tip curved cover scales. The seeds are 2 to 3 mm in size with 4 to 6 mm wings.

The number of chromosomes is 2n = 24.

Taxonomy

The East American larch ( Larix laricina (Du Roi) K. Koch ) has the following synonyms: Pinus laricina Du Roi , Larix americana Michx. , Larix tenuifolia Salisb. , Pinus larix var. Americana Pall. , Pinus intermedia Du Roi , Larix microcarpa (Lamb.) Mirb. , Abies microcarpa (Lamb.) Lindl.

photos

  • Branch with leaves

  • East American larch with cones

  • Bark and short shoots

  • Seedlings

swell

  • Christopher J. Earle: Larix laricina. In: The Gymnosperm Database. May 27, 2011, accessed November 6, 2011 .

Individual evidence

  1. ^ Tropicos. [1]
  2. ↑ Larix laricina in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved August 3, 2016.
  3. ↑ Rafaël Govaerts (ed.): Larix. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved April 12, 2019.

Web links

Commons : East American larch ( Larix laricina )  - Collection of images, videos, and audio files