Reddish cinquefoil

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Reddish cinquefoil
Reddish cinquefoil (Potentilla heptaphylla)

Reddish cinquefoil ( Potentilla heptaphylla )

Systematics
Eurosiden I
Order : Rose-like (rosales)
Family : Rose family (Rosaceae)
Subfamily : Rosoideae
Genre : Finger herbs ( potentilla )
Type : Reddish cinquefoil
Scientific name
Potentilla heptaphylla
L.

The Ruddy cinquefoil ( Potentilla heptaphylla ), also Siebenblättriges cinquefoil called, is a plant from the family of the rose family (Rosaceae). It occurs more frequently in Central Europe only in certain areas.

description

The reddish cinquefoil is a perennial herbaceous plant that reaches heights of 5 to 20 cm. The prostrate to ascending stems and petioles are horizontally protruding shaggy hairs, covered with glandular hairs and often reddish. The basal leaves are long-stalked and seven (to nine) fingered. The oblance-lanceolate leaflets have five to eight teeth on each side, are 10 to 25 mm long and have hairs that are 1 to 2 mm long and directed forward below and above. The free part of the stipules is ovate to lanceolate and membranous in the lowest leaves.

The flower stem is ascending, 10 to 20 cm long and loosely branched into the three to ten flowered inflorescence . The flower stalks are nodding after flowering. The hermaphroditic, radial symmetry flowers have a diameter of about 10 to 15 mm. The outer sepals are elongated-elliptical, obtuse and 2.5 to 4.0 mm long. The sepals are egg-shaped and with a length of 4 to 5 mm, slightly longer than the outer sepals . The petals are yellow, broad-obovate, edged and 5 to 7 mm long. It blooms from April to June. The pollination is usually by insects.

The number of chromosomes is 2n = 14, but also 28, 30, 35, 42, 43.

This species is quite variable in some features (leaflet shape, hairiness), but we cannot separate any infraspecific kin.

Reddish cinquefoil ( Potentilla heptaphylla )

Distribution and location requirements

This species is a central European floral element in the broader sense. It occurs from Alsace-Lorraine in the west to the Ukraine in the east. In the north it reaches East Prussia and southern Sweden, in the south still northern Italy, Montenegro and the lower Danube region. This species is absent in western and southern Europe. In Austria it occurs sparsely or rarely, in Switzerland it is found rarely and only in the north of the area.

The reddish cinquefoil is somewhat more common in Germany in the east and south of the area. Otherwise practically absent.

Potentilla heptaphylla grows on lean, dry sand and gravel soils that are rich in bases and mostly also lime, on lime-weathered loam and loess. It prefers limestone, dry and poor grass, but also occurs in fringing communities and in open dry forests.

Locations and distribution in Central Europe

The reddish cinquefoil needs calcareous, loamy-sandy soil.

It colonizes dry grassland and rains, but it also goes on walls and dry bushes. It occurs particularly in societies of the order Brometalia, but also in those of the Festucion valesiacae, Cirsio-Brachypodion, Alysso-Sedion or Erico-Pinion associations.

It is very rare in the low mountain ranges north of the Stuttgart-Nuremberg line; in the Swabian-Franconian Jura, in western and northern Switzerland it is rare. It occurs scattered in Upper and Lower Austria as well as in Burgenland. At the southern foot of the Alps you can probably only find it in the Valtellina .

The main area of ​​the species is in Eastern Europe .

Systematics

The species name Potentilla heptaphylla was given in Cent by Carl von Linné in 1755 . Pl. I , 13 first published. Synonyms are: Fragaria rubens Crantz , Potentilla opaca L. , Potentilla rubens (Crantz) Zimmeter .

Of Potentilla heptaphylla there are sexual and apomictic races.

literature

  • Henning Haeupler, Thomas Muer: picture atlas of the fern and flowering plants of Germany . Ed .: Federal Agency for Nature Conservation (=  The fern and flowering plants of Germany . Volume 2 ). Eugen Ulmer, Stuttgart (Hohenheim) 2000, ISBN 3-8001-3364-4 .
  • Wolfgang Adler, Karl Oswald, Raimund Fischer: Excursion flora of Austria . Ed .: Manfred A. Fischer. Eugen Ulmer, Stuttgart / Vienna 1994, ISBN 3-8001-3461-6 .
  • Christian Heitz: School and excursion flora for Switzerland. Taking into account the border areas. Identification book for wild growing vascular plants . Founded by August Binz. 18th completely revised and expanded edition. Schwabe & Co., Basel 1986, ISBN 3-7965-0832-4 .
  • Erich Oberdorfer : Plant-sociological excursion flora . With the collaboration of Theo Müller. 6th, revised and expanded edition. Eugen Ulmer, Stuttgart (Hohenheim) 1990, ISBN 3-8001-3454-3 .
  • Konrad von Weihe (ed.): Illustrated flora. Germany and neighboring areas. Vascular cryptogams and flowering plants . Founded by August Garcke. 23rd edition. Paul Parey, Berlin / Hamburg 1972, ISBN 3-489-68034-0 .
  • Dietmar Aichele, Heinz-Werner Schwegler: The flowering plants of Central Europe , Franckh-Kosmos-Verlag, 2nd revised edition 1994, 2000, Volume 2, ISBN 3 440-08048-X

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 541.

Web links

Commons : Reddish cinquefoil  album with pictures, videos and audio files