Dolomite rock flowers

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Dolomite rock flowers
Systematics
Eurosiden II
Order : Cruciferous (Brassicales)
Family : Cruciferous vegetables (Brassicaceae)
Tribe : Arabideae
Genre : Rock flowers ( Draba )
Type : Dolomite rock flowers
Scientific name
Draba dolomitica
Butler

The dolomite rock flower ( Draba dolomitica ) is a representative of the rock flower ( Draba ) that occurs only in a limited area of ​​the Eastern Alps .

features

The Dolomites Whitlowgrass is a perennial , herbaceous plant . It reaches heights of 1 to 4 cm. The leaves are in dense, spherical rosettes and are linear-lanceolate to lanceolate-ovate, hardly keeled and up to 4 mm wide. The flower stalks are not leafed.

The petals are sulfur yellow to whitish. Stamens and petals are about the same length. Flowering time is June to August, pollination takes place by insects or self-pollination . The fruit is a 4 to 7 mm long pod .

Occurrence

The dolomite rock flower occurs only in a small area of ​​the Eastern Alps: in the Brenner area in North and South Tyrol, in the Dolomites and in the Brenta group . It is seldom to very rare, in Austria it is considered endangered.

It grows in the alpine heights on level to slightly inclined limestone rubble soils and in limestone corridors. In terms of plant sociology, it reaches its optimum in the association of the Thlaspion rotundifolii.

Systematics

The dolomite rock flower is an allotetraploid species that originated from the two parent species Draba fladnizensis and Draba hoppeana . Their chromosome number is 2n = 32.

literature

  • Karl Peter Buttler : Draba dolomitica Buttler, an overlooked species of the Dolomites and the Brenner Alps. Characteristics - distribution - relationship. In: Communications from the Botanical State Collection, Munich. Volume 8, 1969, pp. 539-566.
  • Siegmund Seybold (Ed.): Schmeil-Fitschen interactive (CD-Rom), Quelle & Meyer, Wiebelsheim 2001/2002, ISBN 3-494-01327-6 .

Individual evidence

  1. ↑ David Aeschimann et al .: Flora Alpina . Volumes 1 and 2. Bern, Stuttgart, Vienna Haupt-Verlag, 2004. ISBN 3-258-06600-0
  2. ↑ Jaakko Jalas, Juha Suominen: Atlas florae europaeae . Volume 11 Cruciferae (Ricotia to Raphanus). Page 82, Helsinki 1996. ISBN 951-9108-11-4

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