Dwarf cinquefoil

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Dwarf cinquefoil
Potentilla brauneana

Potentilla brauneana

Systematics
Eurosiden I
Order : Rose-like (rosales)
Family : Rose family (Rosaceae)
Subfamily : Rosoideae
Genre : Finger herbs ( potentilla )
Type : Dwarf cinquefoil
Scientific name
Potentilla brauneana
Hoppe ex Nestl.

The dwarf finger herb ( Potentilla brauneana ), even smallest finger herb called, is a plant from the genus Potentilla ( Potentilla ) within the family of Rosaceae (Rosaceae).

description

The dwarf cinquefoil is a lawn-forming, green wintering, perennial , herbaceous plant that reaches heights of up to 5 centimeters. The thin stems are only one or two leaved and prostrate or ascending. Stem, calyx, as well as the leaf and flower stalk are sparsely hairy and without glands ( indument ). The basal leaves are fingered in three digits. The leaflets are not very deeply serrated on the edge and fresh green on both sides. The top of the leaflets is bare and there are sparse curry hairs on the underside and on the leaf veins .

The flowering period extends from July to August. The flowers are usually solitary up to three. The hermaphroditic flowers are 7 to 12 millimeters in diameter and have radial symmetry and five-fold. The five egg-shaped sepals are significantly longer than the five outer sepals . The five free, yellow petals are the same length or shorter than the sepals. There are 20 stamens .

The number of chromosomes is 2n = 14.

Occurrence

The distribution area Potentilla brauneana includes the Pyrenees , the Southern Alps and the Balkans. It occurs in Central Europe in the Northern and Southern Limestone Alps ; it is rare in the southern Swiss Jura .

In their alpine location, the dwarf cinquefoil can usually be found at altitudes above 2000 meters, in Bavaria also at around 1100 meters. In the Allgäu Alps in Bavaria on the Linkerskopf it rises to an altitude of 2443 meters. This infrequent plant species occurs only over limestone in long snow-covered layers. It colonizes snow soils and snow valleys that are moist with groundwater . It is a character species of the Arabidion caeruleae association, but also occurs in Lägerfluren together with the Läger bluegrass ( Poa supina ).

The dwarf cinquefoil grows best on calcareous , clayey , sometimes also somewhat sandy soils .

supporting documents

literature

  • Xaver Finkenzeller, Jürke Grau: Alpine flowers. Recognize and determine (=  Steinbach's natural guide ). New edited edition. Mosaik, Munich 1996, ISBN 3-576-10558-1 .

Individual evidence

  1. ↑ a b Erich Oberdorfer : Plant-sociological excursion flora for Germany and neighboring areas . 8th edition. Verlag Eugen Ulmer, Stuttgart 2001, ISBN 3-8001-3131-5 . Page 540-541.
  2. ↑ a b c Dietmar Aichele, Heinz-Werner Schwegler: The flowering plants of Central Europe . 2nd Edition. tape 2 : Yew family to butterfly family . Franckh-Kosmos, Stuttgart 2000, ISBN 3-440-08048-X .
  3. ↑ Erhard Dörr, Wolfgang Lippert : Flora of the Allgäu and its surroundings. Volume 2, IHW, Eching 2004, ISBN 3-930167-61-1 , p. 69.

Web links

Commons : Dwarf cinquefoil ( Potentilla brauneana )  - Album with pictures, videos and audio files