Single-leaved ash

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Single-leaved ash
Single-leaved ash (Fraxinus anomala) in southern Nevada

Single-leaved ash ( Fraxinus anomala ) in southern Nevada

Systematics
Asterids
Euasterids I
Order : Mint family (Lamiales)
Family : Olive family (Oleaceae)
Genre : Ash trees ( Fraxinus )
Type : Single-leaved ash
Scientific name
Fraxinus anomala
Torr. ex S. Watson

The single-leaved ash ( Fraxinus anomala ) is a shrub or deciduous tree native to the United States.

description

The single-leaved ash is a shrub or small, round-crowned deciduous tree that can reach a height of 8 meters. The twigs are sharp square, the terminal buds are hairy brown. The leaves are often simple, rarely are individual leaves composed of three to five leaflets . The leaflets are broadly ovate to almost circular, 2 to 5 centimeters long, rounded or pointed with a broad wedge-shaped base. The leaf margin is whole or indistinctly notched. The petiole is initially hairy. The flowers are hermaphroditic or unisexual and are in short, hairy, lateral panicles . Petals are missing. The flowers appear together with the leaves in May. The fruits are 2 centimeters long, flat nut fruits , the wing edge of which runs down to the base.

photos

  • Single-leaved ash fruiting

  • leaves

  • fruit

Distribution and ecology

The range of the single-leaved ash extends from the Rocky Mountains over the southwest of the United States to California. There you can find them in floodplains and riparian wood on moderately dry to fresh, slightly acidic to strongly alkaline, sandy, gravelly or loamy, very nutrient-rich soils in sunny locations. It is moderately frost hardy, but can withstand heat.

Systematics

The single-leaved ash ( Fraxinus anomala ) is a species from the genus of ash ( Fraxinus ). There it is assigned to the Dipetalae section .

One can distinguish between two varieties:

  • Fraxinus anomala var. Anomala : It occurs from the western United States to northwestern New Mexico.
  • Fraxinus anomala var. Triphylla M.E. Jones : It occurs from southeastern California to southwestern New Mexico.

proof

literature

  • Andreas Roloff , Andreas Bärtels: Flora of the woods. Purpose, properties and use. With a winter key from Bernd Schulz. 3rd, corrected edition. Eugen Ulmer, Stuttgart (Hohenheim) 2008, ISBN 978-3-8001-5614-6 , p. 306.

Individual evidence

  1. ↑ a b Roloff et al .: Flora of the Woods , p. 306
  2. ^ Fraxinus anomala. In: Germplasm Resources Information Network (GRIN). United States Department of Agriculture, accessed December 28, 2010 .
  3. ↑ a b c Rafaël Govaerts (Ed.): Fraxinus anomala. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved December 10, 2017.

Web links

Commons : Single-leaved ash ( Fraxinus anomala )  - Collection of images, videos and audio files