Holosteum umbellatum
Umbels - Spurre ( Holosteum umbellatum )
The umbels - Spurre ( Holosteum umbellatum ) is a species of the carnation family ( Caryophyllaceae ).
- 5.1 Literature
- 5.2 Notes and references
Description
The annual herbaceous plant reaches a height of about 3 to 25 cm. The leaves are bluish - green. In the upper part of the stem, sometimes a whole is more or less densely covered with glandular hairs. The upper leaves are sessile, ovate with long stumpflicher tip and about 1 to 1.5 cm, the lower ones are more or less elongated.
The flowers are arranged doldenartig, repulsed their stems after flowering. Recently, however, they stand up again. The crown is white and often tinged with reddish. The petals are serrated slightly longer than the calyx and fine. It flowers early in March and April.
The chromosome number is 2n = 20
System
Holosteum umbellatum was first published in 1753 by Carl Linnaeus in Species Plantarum.
The umbels - Spurre arrives in Europe and in the Mediterranean in five subspecies:
- Holosteum umbellatum subsp. glutinosum ( M.Bieb. ) Nyman
- Holosteum umbellatum subsp. hirsutum ( Mutel ) Breistr. , occurs only in France
- Holosteum umbellatum L. subsp. umbellatum Holosteum umbellatum var parceglandulosum, appears among other things in the Pannonian region in Austria on
Occurrence
Habitat requirements
The umbels - Spurre grows in fields and dunes, in premolars sand grass, on gravel roofs and dams. It prefers dry summer, more or less nutrient-rich, usually low in calcium, neutral moderately acidic, humus or loose, loamy or pure gravel and sand but also stone floors. She's a bit of thermophilic sand pointer.
Popularization
Holosteum umbellatum comes from Southern Scandinavia ago to the Mediterranean region and North Africa. It also penetrates from the Near East to the East Indies before and Siberia. It is a sub-Mediterranean Florenelement. They also spread to other parts of the world and is naturalized before in North America, Argentina and South Africa.
Distribution in Central Europe
The umbels - Spurre is fairly common in the central and southern part of Germany. In the north- west and north- east it is rare or absent. You lack, among other things in the Alps. In Austria, the umbels - Spurre comes in the Pannonian area frequently, otherwise scattered to rare. It is there also endangered in some areas. In Switzerland, it is locate scattered in the warmer parts of the country.
Pictures
Voucher specimen
Kahle stem leaves of Holosteum umbellatum var umbellatum
Inflorescence with bare flower stalks and sepals of Holosteum umbellatum var umbellatum
Hairy stem leaves of Holosteum umbellatum var parceglandulosum
Inflorescence with glandular hairy flower stalks and sepals of Holosteum umbellatum var parceglandulosum
Seed