Various-billed grove buttercups

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Various-billed grove buttercups
Different-billed grove buttercup (Ranunculus polyanthemoides) (Herbarium evidence)

Different-billed grove buttercup ( Ranunculus polyanthemoides ) ( Herbarium evidence )

Systematics
Order : Buttercups (Ranunculales)
Family : Buttercup Family (Ranunculaceae)
Subfamily : Ranunculoideae
Tribe : Ranunculeae
Genre : Buttercup ( Ranunculus )
Type : Various-billed grove buttercups
Scientific name
Ranunculus polyanthemoides
Boreau

The different- billed grove buttercup ( Ranunculus polyanthemoides , syn .: Ranunculus polyanthemos ssp. Polyanthemoides (Bor.) Ahlfvengren; R. serpens subsp. Polyanthemoides (Bor.) Kerguélen & Lambinon), also known as the polyanthemus-like buttercup , is a member of the Buttercup Family (Ranunculaceae).

Appearance

The different-billed 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.

The various-billed grove buttercup, which is a herbaceous plant of several years, typically has an upright stem that is about 20 to 50 cm high. This is never prostrate (in contrast to the rooting grove buttercup ( Ranunculus serpens )) and therefore does not sprout rosettes of leaves.

The basal leaves are usually incised in three parts down to the base, but in contrast to those of R. polyanthemos, they are not deeply five-cut. The individual sections, which often overlap, are usually divided into three lobes. The stem leaves are usually deeply cut to the base of the stem.

The flower stalks are furrowed and hairy protruding. The flowers are bright yellow.

The approximately 1.5 mm long fruit beaks are slightly curved, but occasionally also straight and pointed. (Difference from the slit-leaved grove buttercup ( Ranunculus polyanthemophyllus )). They are usually much shorter than the rest of the nut.

The species is diploid and has a chromosome number of 2n = 16.

Distribution and location requirements

Different-billed grove buttercup (fruits)

The general distribution of this species is still insufficiently researched. So far there have been finds from France, Germany, Switzerland, Austria, Italy, Greece, Sweden and Finland, but also from Albania, Belgium, Bulgaria, the Czech Republic, Denmark, Norway, Hungary, the former Yugoslavia, Poland and Romania.

In Germany, Ranunculus polyanthemoides is apparently rare. There are mainly finds from the central area.

In Austria as in Switzerland, the distribution is largely unknown.

The different-billed grove buttercup grows in meadows and on the edges of forests and prefers possibly calcareous soils. In southern Germany it occurs on mesobrometes.

Possible confusion

The exact classification of the different-billed grove buttercup is partly controversial. While some authors regard it as a subspecies of the many-flowered grove buttercup ( Ranunculus polyanthemos ), it has recently been granted species status. The differentiation from Ranunculus polyanthemos is sometimes very difficult, which is made even more complicated by the appearance of hybrids.

literature

Individual evidence

  1. ↑ a b Erich Oberdorfer : Plant-sociological excursion flora for Germany and neighboring areas . With the collaboration of Angelika Schwabe and Theo Müller. 8th, heavily revised and expanded edition. Eugen Ulmer, Stuttgart (Hohenheim) 2001, ISBN 3-8001-3131-5 , pp.  410 .
  2. ↑ Jaakko Jalas, Juha Suominen: Atlas florae europaeae . Volume 8 (Nymphaeaceae to Ranunculaceae). Page 120, Helsinki 1989. ISBN 951-9108-07-6

Web links

Commons : Divergent Grove Buttercup  - Album with pictures, videos and audio files