Purshia tridentata

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Purshia tridentata
Purshia tridentata 9732.JPG

Purshia tridentata

Systematics
Class : Bedecktsamer (Magnoliopsida)
Order : Rose-like (rosales)
Family : Rose family (Rosaceae)
Subfamily : Dryadoideae
Genre : Purshia
Type : Purshia tridentata
Scientific name
Purshia tridentata
( Pursh ) DC.

Purshia tridentata is a species of plant in the genus Purshia from the rose family (Rosaceae). It thrives in the mountainous areas of western North America , where it is English bitterbrush, antelope bitterbrush ,, antelope bush, Buckbrush, quinine brush, deerbrush, Blackbrush, greasewood called.

description

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Illustration from Flora Americae Septentrionalis , plate 15, p. 333
The flowers have five yellow petals and darker yellow stamens

Vegetative characteristics

Purshia tridentata is a deciduous shrub that reaches heights of 1 to 5 meters.

The leaves are slender and three- to five-lobed from 5 to 20 millimeters in length.

Generative characteristics

The hermaphroditic flowers are radial symmetry and five-fold with a double flower envelope . The five pale yellow petals are 6 to 8 millimeters long. The stamens are darker yellow than the petals.

The collective fruit is an aggregate of dry, slender, leathery achenes 0.6 to 2 centimeters in length.

ecology

Purshia tridentata is nitrogen fixing .

Occurrence

Purshia tridentata var. Glandulosa on a dry slope

The species Purshia tridentata occurs in North America from southeastern British Columbia in the north east to Montana and Wyoming , south to New Mexico and west to California .

It grows on arid mountain and other slopes. In California it occurs at altitudes of 700 to 3400 meters, including in the Peninsular Ranges , Transverse Ranges and in the Sierra Nevada as well as in the southern Cascade Range . Further north it grows at lower altitudes such as between 320 and 1065 meters in British Columbia.

Systematics

The first publication took place under the name ( Basionym ) Tigarea tridentata by Frederick Traugott Pursh . The new combination to Purshia tridentata (Pursh) DC. was in 1818 by Augustin-Pyrame de Candolle in Trans. Linn. Soc. Published London , Volume 12, page 158.

From Purshia tridentata are two varieties :

  • Purshia tridentata var. Glandulosa : This endemic thrives only in the Eastern Sierra Nevada in southern California.
  • Purshia tridentata (Pursh) DC. var. tridentata

Individual evidence

  1. ↑ a b Purshia tridentata . United States Department of Agriculture, Natural Resources Conservation Service. Retrieved October 16, 2015.
  2. ↑ a b c d Purshia tridentata . In: CalFlora Database . Retrieved August 20, 2019.
  3. ↑ a b c James Henrickson: Purshia tridentata (Pursh) de Candolle. . In: Flora of North America . Retrieved August 20, 2019.
  4. ^ David Andrews Dalton: Nitrogen fixation by Purshia tridentata: some ecological aspects and root nodule anatomy . Oregon State University, 1975.
  5. ^ Brian Vanden Heuvel, Thomas J. Rosatti: Purshia tridentata . In: Jepson Flora Project . 2016. Retrieved August 20, 2019.
  6. ↑ Purshia tridentata (Pursh) DC. . In: E-FLORA BC: Electronic Atlas of the Flora of British Columbia . Retrieved August 20, 2019.
  7. ↑ Purshia tridentata var. Glandulosa . In: CalFlora Database . Retrieved August 20, 2019.
  8. ↑ Purshia tridentata var. Tridentata . In: CalFlora Database . Retrieved August 20, 2019.

Web links

Commons : Purshia tridentata  - collection of images, videos and audio files