Sweet milkweed
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Sweet Spurge ( Euphorbia dulcis ) |
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| Euphorbia dulcis | ||||||||||||
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The sweet milkweed ( Euphorbia dulcis ) is a species of the genus milkweed ( Euphorbia ) in the family of the milkweed plants (Euphorbiaceae).
description
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Vegetative characteristics
The sweet milkweed is a deciduous, perennial herbaceous plant that reaches a height of 20 to 50 cm. As a survival organ, it forms a fleshy, horizontally growing rhizome . The stem is round, hairy towards the top. The middle and upper leaves are 40 to 90 mm long and 10 to 20 mm wide.
Generative characteristics
The bracts are triangular, truncated at the base. The entire inflorescence is not very branched and has at most five umbel rays . The nectar glands are initially yellow-green, later dark purple.
The fruits are warty, hairy (subsp. Dulcis ) or (at least in old age) bald (subsp. Incompta ) capsule fruits with a length of 3 to 4 mm.
Both subspecies have the chromosome number 2n = 12.
Occurrence
Euphorbia dulcis is common in Europe. It grows in herbaceous deciduous forests, often on stream meadows. It thrives best on fresh, alkaline and nutrient-rich loam soil . She is a species of character of the order Fagetalia.
Systematics
Euphorbia dulcis was first published by Carl von Linné
There are two subspecies:
- Euphorbia dulcis L. subsp. dulcis : It has hairy fruit capsules even when ripe.
- Euphorbia dulcis subsp. incompta (Ces.) Nym. (Syn .: Euphorbia dulcis subsp. Purpurata (Thuill.) Rothm. ): Their fruit capsules are initially hairy at most, later glabrous. This subspecies rises in the Allgäu Alps near the Madautal near the former Noppenhütte near Elbigenalp up to an altitude of 1600 meters.
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
- ↑ a b Erich Oberdorfer : Plant-sociological excursion flora for Germany and neighboring areas. 8th edition. Stuttgart, Verlag Eugen Ulmer, 2001. Page 637. ISBN 3-8001-3131-5 .
- ↑ Erhard Dörr, Wolfgang Lippert : Flora of the Allgäu and its surroundings. Volume 2, IHW, Eching 2004, ISBN 3-930167-61-1 , p. 192.
Web links
- Sweet milkweed . In: BiolFlor, the database of biological-ecological characteristics of the flora of Germany.
- Euphorbia dulcis L., sweet milkweed. In: FloraWeb.de.
- Euphorbia dulcis subsp. purpurata (Thuill.) Rothm., Purpur-Wolfsmilch, Syn: Euphorbia dulcis subsp. incompta (Ces.) Nyman. In: FloraWeb.de.
- Profile and distribution map for Bavaria . In: Botanical Information Hub of Bavaria .
- Euphorbia dulcis L. In: Info Flora , the national data and information center for Swiss flora . Retrieved November 30, 2015.
- Thomas Meyer: Data sheet with identification key and photos at Flora-de: Flora von Deutschland (old name of the website: Flowers in Swabia )