Steppe Spurge

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Steppe Spurge
Steppe Spurge (Euphorbia seguieriana)

Steppe Spurge ( Euphorbia seguieriana )

Systematics
Rosids
Eurosiden I
Order : Malpighiales (Malpighiales)
Family : Spurge Family (Euphorbiaceae)
Genre : Spurge ( Euphorbia )
Type : Steppe Spurge
Scientific name
Euphorbia seguieriana
Neck.

The steppe spurge ( Euphorbia seguieriana ) is a species of the genus spurge ( Euphorbia ) in the family of the spurge family (Euphorbiaceae). It is common in Eurasia .

description

Stem with leaf
Inflorescence (detail)
Illustration from Flora Batava , Volume 9

Vegetative characteristics

The steppe milkweed is a perennial herbaceous plant that reaches a height of 15 to 40 centimeters. The vegetative parts of the plant are colored blue-green.

The leaves are leathery and appear succulent . The middle leaves are 10 to 20 millimeters long and 2 to 4 millimeters wide and are linear-lanceolate and end in a spiked tip.

Generative characteristics

The inflorescences consist of more than eight rays, which in turn are forked dichotomously once or twice (rarely up to five times).

The capsule fruits are 2 to 3 millimeters long, finely dotted and glabrous.

The number of chromosomes is 2n = 16 or 18.

Occurrence

The steppe milkweed is common in Eurasia .

It grows on dry continental grass . In Central Europe it thrives best on dry, warm, base-rich, nutrient-poor loess and clay soils . In Central Europe it is a character species of the order Festucetalia valesiacae, but also occurs in societies of the Xerobromion or Koelerion glaucae associations.

Euphorbia seguieriana subsp. niciciana

Systematics

Euphorbia seguieriana was first published in 1770 by Noël Martin Joseph de Necker . The specific epithet seguieriana honors the French archaeologist and botanist Jean François Séguier (1703–1784).

The following subspecies can be distinguished:

  • Euphorbia seguieriana subsp. Hohenackeri (Boiss.) Rech. f. (Syn .: Euphorbia Hohenackeri Hochst. Ex Boiss. ): It occurs from eastern Turkey to the Caucasus .
  • Euphorbia seguieriana subsp. niciciana (Borbás ex Novák) Rech. f. (Syn .: Euphorbia niciciana Borbás ex Novák , Euphorbia seguieriana var. Niciciana (Borbás ex Novák) Geltman , Euphorbia esuloides Velen. Ex Nyman nom. Illeg., Euphorbia reflexa Formánek nom. Illeg., Euphorbia rumelica Formánek ): It comes from the Balkan Peninsula to Pakistan .
  • Euphorbia seguieriana Neck. subsp. seguieriana (Syn .: Euphorbia gerardiana Jacq. , Euphorbia caiogala Ehrh. , Euphorbia seguieri (Scop.) All. , Euphorbia campestris S. Geuns , Euphorbia linariifolia Lam. , Euphorbia homophylla Lange ex closet , Euphorbia firma Ledeb. , Euphorbia ex ventosica Ventosica Timb.-Lagr. , Euphorbia syrmiensis kit. , Euphorbia loiseleurii (Rouy) Prain , Euphorbia sturii Holuby ex Velen. , Euphorbia seguieriana subsp. loiseleurii (Rouy) Greuter & Burdet , Euphorbia seguieriana var. gerardiana (Jacq.) Fiori , Euphorbia seguieriana var. minor (Duby) Wilczek , Euphorbia seguieriana var. virgata Fiori , Euphorbia seguieriana var. petrogena Tamamsch. , Euphorbia seguieriana var. arenivaga (Martrin-Donos) Oudejans , Euphorbia seguieriana var. dentata (Chabert) Oudejans , Euphorbia seguieriana var. firma (Ledeb.) Oudejans , Euphorbia seguieriana var. Intermedia (Savul.) Oudejans , Euphorbia seguieriana var. Lanceolata (Cariot) Oudejans , Euphorbia seguieriana var. Latifolia (JJSchmitz & Regel) Oudejans , E uphorbia seguieriana var. sturii (Holuby) Oudejans , Euphorbia seguieriana var. dolomitica (Liou) Jauzein ): It occurs from Europe to Pakistan and northwestern China .

literature

  • Otto Schmeil, Jost Fitschen, Siegmund Seybold: Flora of Germany and neighboring countries. 93rd edition, Quelle & Meyer Verlag GmbH & Co., Wiebelsheim 2003, ISBN 3-494-01413-2 .
  • Hans-Joachim Zündorf, Karl-Friedrich Günther, Heiko Korsch and Werner Westhus (eds.): Flora of Thuringia . Weissdorn-Verlag, Jena 2006, ISBN 3-936055-09-2 .

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 639.
  2. ↑ a b c d Rafaël Govaerts (Ed.): Degeneria. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved December 3, 2015.

Web links

Commons : Steppe Spurge ( Euphorbia seguieriana )  - Album with pictures, videos and audio files