Rock elm

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Rock elm
Ulmus thomasii (meisse) 1.jpg

Rock elm ( Ulmus thomasii )

Systematics
Rosids
Eurosiden I
Order : Rose-like (rosales)
Family : Elm family (Ulmaceae)
Genre : Elms ( ulmus )
Type : Rock elm
Scientific name
Ulmus thomasii
Coffin.

The rock elm ( Ulmus thomasii ) is a deciduous tree belonging to the elm genus . The distribution area extends over the middle and eastern North America.

description

leaves
Branch with cork strips

The rock elm is a slow-growing deciduous tree that reaches a height of 30 meters. The branches are often provided with cork strips. The inner rind is lemon yellow. The leaves are 5 to 11 inches long with a slightly asymmetrical base. The upper side of the leaf is shiny and smooth and a maximum of 21 pairs of lateral nerves are formed. The flowers are in hanging clusters up to 5 centimeters long. Flowering time is March to April. The fruits are hairy and have a thickened and ciliate edge.

Distribution and ecology

The natural range of the rock elm stretches across central and eastern North America from Québec to South Dakota and south to Tennessee and Missouri . They are often found there in stony locations on rocky slopes and in rocky gorges. It grows best on moist, well-drained, loamy soils in low and hilly areas. It is very shade-tolerant and often grows in mixed forests with demanding hardwood species such as hickories ( Carya ), ash ( Fraxinus ) and maples ( Acer ).

Systematics

The rock elm ( Ulmus thomasii ) is a species from the genus of the elm ( Ulmus ). There it is assigned to the section Trichoptelea in the subgenus Oreoptelea . A synonym of the species is Ulmus racemosa Thomas .

use

The wood of the rock elm is considered to be the best elm wood and was used for shipbuilding, wagon making and for the manufacture of furniture. However, the species has become rare due to overuse . In Central Europe they can be found in botanical gardens.

proof

literature

  • Schütt, Schuck, Stimm: Lexicon of tree and shrub species . Nikol, Hamburg 2002, ISBN 3-933203-53-8 , pp. 544 .

Individual evidence

  1. ↑ a b c d Schütt et al .: Lexicon of Tree and Shrub Species, p. 544
  2. ↑ Ulmus thomasii. In: Germplasm Resources Information Network (GRIN). United States Department of Agriculture, accessed December 28, 2010 .

Web links

Commons : Rock Elm  - Collection of images, videos and audio files