The Thorny restharrow is sometimes with creeping restharrow (Ononis repens) and field-restharrow (Ononis arvensis) of species group Ononis spinosa agg. summarized. The assignment of individual specimens for each species is sometimes almost impossible, because there are transitional forms between them.
The Creeping restharrow is characterized mainly by the thornless stems. Other features are mostly single flowers in clusters and the middle part of leaf that is more than twice as long as broad for this species. The deposits are those of the thorny restharrow often identical or overlapping.
The field-restharrow also has a thornless stems, but always sitting here two to three heaped flowers in the leaf axils and on the branch ends grapey. The species is rare and is found almost exclusively on calcareous grasslands. In Germany it is growing in Mecklenburg-Western Pomerania and Brandenburg. In Austria it is found in Lower and Upper Austria and Styria.
Ecology
As with most legumes, the restharrow Thorny, in its root nodules in symbiosis with nitrogen-fixing bacteria (Rhizobium one) and thus contributes to the fertility of the soil. Also symbiosis with root fungi takes place.
The pollination mechanism is between pumping mechanism and folding mechanism. In young flowers, the upper edges of the keel and the keel is still adherent to close an opening at the top. After repeated depressing of shuttle wings and splits the upper edge and re-visiting insects emerge the stamens and stigma, this is called pumping mechanism. When the pressure is the stamens are again recovered from the boat, this is called a folding mechanism.
The flowers are beautiful Strichsaftmale but provide no nectar, instead, all 10 stamens fused into a tube. All the more amazing is that bees are the main visitors. The seeds are spread by zoochory and Autochorie.
Source: http://de.wikipedia.org/wiki/Dornige_Hauhechel
See Also: sending flowers, online florist
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