Slit-leaved grove buttercup
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Slit-leaved grove buttercup ( Ranunculus polyanthemophyllus ) ( Herbarium evidence ) |
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| W. Koch & Hess |
The slit-leaved grove buttercup ( Ranunculus polyanthemophyllus , syn .: Ranunculus serpens subsp. Polyanthemophyllus ), also known as the polyanthemus-leaved buttercup , is a member of the buttercup family (Ranunculaceae).
Appearance
The slit-leaved grove buttercup is closely related to the multi-flowered grove buttercup ( Ranunculus polyanthemos ). It belongs to a difficult group of buttercups, some of which are difficult to separate from each other.
Typically, the slit-leaved grove buttercup, which is a herbaceous plant of several years , has an upright stem about 50 to 100 cm high. This is never prostrate (in contrast to Ranunculus serpens ) and therefore does not sprout rosettes of leaves. The stem is scattered and hairy only in the upper part.
The basal leaves are usually incised in three to five parts down to the base and usually have a more or less wide central section about 4 to 8 mm long, stalked. The individual sections, which often overlap, are again divided into three lobes and sometimes spotted yellow-green. The stem leaves are usually deeply cut to the base of the stem and have linear lanceolate sections.
The flower stalks are furrowed and hairy protruding. The flowers are bright yellow.
The approximately 1.5 mm long fruit beaks are strongly rolled up in young nuts (in contrast to Ranunculus polyanthemoides and R. polyanthemos ) and when ripe they are strongly curved. They are about 1/4 to 1/2 as long as the rest of the nut.
The slit-leaved grove buttercup blooms mainly in the months from May to July.
The number of chromosomes is 2n = 16.
Distribution and location requirements
The general distribution of this species is still insufficiently researched. So far there have been finds from France, Germany, Switzerland, Austria and Italy.
In Germany, Ranunculus polyanthemophyllus is apparently rare and mainly to be found in the central and extremely western regions.
In Austria as in Switzerland, the distribution is also still uncertain. Obviously it is found scattered or rarely there.
The slit-leaved grove buttercup grows in semi-arid grassland and on the edges of forests and roads. It prefers alkaline clay soils.
Possible confusion
The exact classification of the slit-leaved grove buttercup is partly controversial. While some authors regard it as a subspecies of the rooting grove buttercup ( Ranunculus serpens ), it has recently been granted species status. The differentiation from Ranunculus serpens or also from the different-billed grove buttercup ( R. polyanthemoides ) is sometimes very difficult, which is made even more complicated by the appearance of hybrids.
literature
- Henning Haeupler , Thomas Muer: picture atlas of the fern and flowering plants of Germany (= the fern and flowering plants of Germany. Volume 2). Published by the Federal Agency for Nature Conservation. Ulmer, Stuttgart 2000, ISBN 3-8001-3364-4 .
- Garcke: Illustrierte Flora , Verlag Paul Parey, 1972, ISBN 3-489-68034-0 .
- Wolfgang Adler, Karl Oswald, Raimund Fischer: Excursion flora of Austria. Ed .: Manfred A. Fischer . Ulmer, Stuttgart / Vienna 1994, ISBN 3-8001-3461-6 .
- Binz, Heitz: School and excursion flora for Switzerland , Schwabe & Co. AG, Basel 1986, ISBN 3-7965-0832-4 .
- Oberdorfer: Plant-sociological excursion flora , Ulmer Verlag, Stuttgart 1990, ISBN 3-8001-3454-3 .
Individual evidence
- ^ Erich Oberdorfer : Plant-sociological excursion flora for Germany and neighboring areas . 8th edition. Verlag Eugen Ulmer, Stuttgart 2001, ISBN 3-8001-3131-5 . Page 410.
Web links
- Slit-leaved grove buttercup. In: FloraWeb.de.
- Distribution map for Germany. In: Floraweb .
- Ranunculus polyanthemophyllus W. Koch & HE Hess In: Info Flora , the national data and information center for Swiss flora . Retrieved October 19, 2015.