Gray rock flower
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Gray rock flower ( Draba incana ) |
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The Gray Felsenblümchen ( Draba incana ) is a plant from the genus of Felsenblümchen ( Draba ) in the family of Brassicaceae (Brassicaceae).
description
Vegetative characteristics
The gray rock flower is a biennial or perennial herbaceous plant and reaches heights of up to about 35 centimeters. It grows in lawn. Its root is spindle-shaped and thin. Below the leaf rosette, this species has fibrous leaf remnants, from whose axils renewal shoots grow. The stems are erect, simple or branched.
The basal leaves are elongated lanceolate, they are entire or slightly serrated, 1–2.5 cm long; they are densely star-haired, sometimes with simple hairs towards the base. The mostly numerous stem leaves are longer and narrower than the basal leaves; they are up to 4 cm long, sessile, egg-shaped and usually with entire margins.
Generative characteristics
The flowering period is between May and July. Initially schirmtraubige later traubige inflorescence contains 10 to 40 flowers and is therefore relatively floriferous for this genus. The flower stalks are erect and protruding and 1.5 to 2 mm long.
The hermaphrodite flowers are fourfold. The four sepals are 2 mm long, white skin margins and blunt. The petals are 2.5 to 5 mm long, white, narrow, obovate, rounded or slightly margined.
The bald or hairy, reticulate pods are elongated to lanceolate with a length of 5 to 15 millimeters and a width of 2 to 2.5 millimeters, usually with a stylus up to 0.8 mm long.
The number of chromosomes is 2n = 32.
Occurrence
The gray rock flower occurs mainly in north and north-west Europe and in the Arctic , but also in the Allgäu Alps.
The gray rock flower grows at altitudes of 1500 to 2750 meters. It thrives on sunny rocks or in gappy stone lawns with Elyna , also on Gemslägern on nutrient-rich, mostly calcareous rocks. It focuses on plant communities of the Potentillion caulescentis.
Systematics
The first publication of Draba incana was by Carl von Linné .
Some authors distinguished between two subspecies, but they are accepted species.
literature
- Friedrich Margrave: Cruciferae. In: Gustav Hegi : Illustrated flora of Central Europe. 2nd edition, Volume VI, Part 1 Verlag Carl Hanser, Munich, 1958–1963, pages 73–514.
Individual evidence
- ↑ Erhard Dörr, Wolfgang Lippert : Flora of the Allgäu and its surroundings. Volume 2, IHW, Eching 2004, ISBN 3-930167-61-1 , p. 31.
- ↑ Jaakko Jalas, Juha Suominen: Atlas florae europaeae. Volume 11, Cruciferae (Ricotia to Raphanus). Pages 104-105, Helsinki 1996, ISBN 951-9108-11-4 .
Web links
- Draba incana L., gray rock florets. In: FloraWeb.de.
- Profile and distribution map for Bavaria . In: Botanical Information Hub of Bavaria .
- Draba incana L. In: Info Flora , the national data and information center for Swiss flora . Retrieved October 27, 2015.
- Distribution in the northern hemisphere according to: Eric Hultén , Magnus Fries: Atlas of North European vascular plants 1986, ISBN 3-87429-263-0 .
- Thomas Meyer: Data sheet with identification key and photos at Flora-de: Flora von Deutschland (old name of the website: Flowers in Swabia ).
