Wall rockflowers

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Wall rockflowers
Wall rock florets (Draba muralis), illustration

Wall rock florets ( Draba muralis ), illustration

Systematics
Eurosiden II
Order : Cruciferous (Brassicales)
Family : Cruciferous vegetables (Brassicaceae)
Tribe : Arabideae
Genre : Rock flowers ( Draba )
Type : Wall rockflowers
Scientific name
Draba muralis
L.

The wall rock flower ( Draba muralis ) is a representative of the rock flower ( Draba ).

features

The wall rock flower is a one to two year old plant . It reaches stature heights of 10 to 30, rarely 40 cm. In addition to the basal leaves, the stems have more than three stem leaves. These are half-stem-encompassing, roughly serrated at the tip and, like the stems, covered with 3-5-rayed star hair. The rosette leaves are 1–4 cm long, obovate and narrowed into a short stem. The leaves are mostly covered with simple hairs on the top and branched hairs on the underside. The flower cluster usually has more than 20 flowers and is quite loose later.

The sepals are broadly elliptical and 1–1.5 mm long. The petals are white and 1.5 to 2.5 mm long, rounded at the tip. Flowering time is April to July, pollination takes place by insects or self-pollination .

The pod fruit is oblong-elliptical, 4 to 6 mm long and glabrous. The stylus is mm long for fruit ripening to 0.2. The pods sit on 5–10 mm long, almost horizontal and bare stalks.

The species has chromosome number 2n = 32.

Fruiting wall rock florets

Occurrence

The wall rock flower has its main distribution area in the Mediterranean area. It is rare in Central Europe. The occurrences in Central Europe are partly indigenous and partly neophytic .

It grows in poor grass, in cracks in the earth, on embankments and walls, in bushes. It occurs preferentially on moderately dry to fresh, moderately nutrient-rich, mostly calcareous soils. It is limited to the colline altitude level . Locally it is a character type of the Anarrhinetum from the association of the Galeopsion segetum, but also occurs in societies of the association Alysso-Sedion.

literature

  • Siegmund Seybold (Ed.): Schmeil-Fitschen interactive. (CD-ROM). Quelle & Meyer, Wiebelsheim 2001/2002, ISBN 3-494-01327-6 .
  • Manfred A. Fischer , Karl Oswald, Wolfgang Adler: Excursion flora for Austria, Liechtenstein and South Tyrol. 3rd, improved edition. State of Upper Austria, Biology Center of the Upper Austrian State Museums, Linz 2008, ISBN 978-3-85474-187-9 .

Individual evidence

  1. ↑ a b Erich Oberdorfer : Plant-sociological excursion flora for Germany and neighboring areas . 8th edition. Stuttgart, Verlag Eugen Ulmer, 2001. ISBN 3-8001-3131-5 . Page 457.

Web links

Commons : Mauer-Felsenblümchen ( Draba muralis )  - Album with pictures, videos and audio files