Cockspur Hawthorn
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Cockspur hawthorn ( Crataegus crus-galli ) |
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| Crataegus crus-galli | ||||||||||||
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The Crataegus crus-galli ( Crataegus crus-galli ), also Hahn Dorn called, is a species of hawthorn ( Crataegus ) within the family of the rose family (Rosaceae).
description
The cockspur hawthorn is a deciduous shrub or small tree that reaches heights of growth of 5 to 7 meters. It is hairless in all parts of the plant. The bark is gray to gray-green.
The branches are covered with numerous strong thorns up to 6 centimeters long . The 2 to 5 centimeters long coarse-skinned, later almost leathery leaves are obovate or spatulate in shape. The spade base is long down on the petiole. The leaves turn orange-red in autumn.
Between May and June, the rooster thorn bears white flowers about 1.5 centimeters in diameter . Most of the flowers have 10 stamens . When the fruit is ripe, two round, fleshy and light red apple fruits are usually formed per flower . They measure 10 to 15 millimeters in diameter and carry the upright persistent calyx .
The number of chromosomes is 2n = 34, 51 or 68.
distribution
The cockspur hawthorn is native to the nemoral zone of eastern North America. However, the species was planted in many places by humans in Central Europe and has partly become wild .
It thrives in sunny to partially shaded locations on acidic to calcareous, light to heavy soils.
Systematics
In addition to the nominate form Crataegus crus-galli var. Crus-galli , the variety Crataegus crus-galli var. Capillata coffin was also created. described .
literature
- Jost Fitschen: Woody flora . 8th edition. Quelle & Meyer, Heidelberg 1987, ISBN 978-3-494-01151-6 , p. 58/87 .
- Crataegus crus-galli L. In: Yatskievych, George (Ed.): Flora of Missouri . tape 3 . MBG Press, St. Louis, S. 810 (English, online [accessed November 21, 2008]).
Web links
Individual evidence
- ^ Erich Oberdorfer : Plant-sociological excursion flora for Germany and neighboring areas . 8th edition. Verlag Eugen Ulmer, Stuttgart 2001, ISBN 3-8001-3131-5 . Page 509.
- ↑ Crataegus crus-galli (cockspur-hawthorn). (No longer available online.) Publisher: Julius Kühn Institute - Federal Research Institute for Cultivated Plants (JKI), formerly in the original ; Retrieved November 21, 2008 . ( Page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.
