Lawn Saxifrage

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Lawn Saxifrage
Saxifraga rosacea 01.jpg

Lawn Saxifrage ( Saxifraga rosacea )

Systematics
Eudicotyledons
Nuclear eudicotyledons
Order : Saxifragales (Saxifragales)
Family : Saxifragaceae (Saxifragaceae)
Genre : Saxifrage ( Saxifraga )
Type : Lawn Saxifrage
Scientific name
Saxifraga rosacea
Monk

The lawn-saxifrage ( Saxifraga rosacea ) is a plant of the genus saxifrage ( Saxifraga ) within the family of the Saxifragaceae (Saxifragaceae).

description

The turf saxifrage is a perennial plant that grows in dense or loose, cushion-shaped turf and reaches heights of growth of 5 to 20 centimeters. The shoot has rosette leaves, the stems are erect or ascending, with non-flowering side shoots. The leaves of the sterile shoots are clearly stalked and deeply hand-shaped divided into three to five tips. The ends are blunt to pointed and can also be awn-pointed. The leaf blade is 7-15 millimeters long and 6-20 millimeters wide.

The flowering time of the turf saxifrage is between May and July. Two to nine flower buds each stand upright on the flower stalks. The calyx lobes are 2–4 millimeters long. The petals are white and three to four times as long as the sepals. The stamens are half as long as the petals. The fruit capsule is egg-shaped to almost spherical.

The turf saxifrage has chromosome number 2n = 52, but other numbers have also been determined (32, 48, 50, 56, 64 or 66).

distribution

Turf saxifrage ( Saxifraga rosacea subsp. Rosacea ) on the Swabian Alb, leaf rosettes
Turf saxifrage ( Saxifraga rosacea ) in Finland

The turf saxifrage occurs in Western and Central Europe, on Iceland, on the Faroe Islands and in Greenland. It grows in crevices and rubble, more rarely on walls. It prefers fresh to moderately dry, base-rich stone soil.

Systematics

Saxifraga rosacea was first published by Conrad Moench . The specific epithet rosacea for rose-like probably refers to the leaf rosettes (rosettes!) At the tip of the side shoot, which have a resemblance to the flower of a rose.

There are four subspecies of Saxifraga rosacea Moench (Syn .: Saxifraga decipiens Ehrh. ) In Europe:

  • Saxifraga rosacea subsp. hartii (DAWebb) DAWebb ; it occurs only on Arranmore Island in North West Ireland and has chromosome number 2n = 50
  • Saxifraga rosacea Moench subsp. rosacea ; it occurs in Europe only in north-western Europe, in eastern France and in Germany and has the chromosome number 2n = 48, 52 or 56
  • Saxifraga rosacea subsp. steinmannii (exchange) Holub ; it occurs only in the central Elbe valley in the Czech Republic and has the chromosome number 2n = 52, approx. 56 or 66
  • Saxifraga rosacea subsp. sternbergii (Willd.) Kerguélen & Lambinon (syn .: S. cespitosa subsp. sponhemica (CC Gmelin) Bonnier & Layens ); it occurs only in Belgium, in eastern France, western Germany, the Czech Republic and Poland and has the chromosome number 2n = 52. The name of the subspecies honors Kaspar Maria von Sternberg , who researched the saxifrage species . The name sponhemica refers to the place Burgsponheim in Rhineland-Palatinate, where this clan occurs. It occurs on base-rich, lime-poor rock, for example on Melaphyr, and is a character species of Saxifragetum sponhemicae from the Androsacion vandellii association.

literature

Individual evidence

  1. ↑ Jaakko Jalas, Juha Suominen, Raino Lampinen, Arto Kurtto: Atlas florae europaeae . Volume 12 (Resedaceae to Platanaceae). Pages 186-187, Helsinki 1999. ISBN 951-9108-12-2
  2. ^ Erich Oberdorfer : Plant-sociological excursion flora for Germany and neighboring areas . 8th edition. Verlag Eugen Ulmer, Stuttgart 2001, ISBN 3-8001-3131-5 . Page 491.

Web links

Commons : Lawn Saxifrage ( Saxifraga rosacea )  - Album with pictures, videos and audio files