Limodorum abortivum
Limodorum ( Limodorum abortivum )
The Purple Dingel ( Limodorum abortivum ) is a species of the genus Dingel ( Limodorum ) in the orchid family ( Orchidaceae).
- 5.1 Notes and references
Description
The plants are Rhizomgeophyten with numerous long, fleshy roots. The rhizome itself is short, thick and fleshy too. The strong, finely striped stem is 20-60 cm tall with failed -ended scale leaves.
The inflorescence is loose and 5 - to 20 - flowered. The bracts are longer than the ovary. The peduncle is short and rotated. The lip of the flower is horizontally - up upright - spreading, indistinctly constricted near the bottom, forelimb ( Epichil ) with highly curved wavy edge, curved in the longitudinal direction to the outside.
Floral biology
The flowering time is June in Central Europe ( May).
In the literature, the species is described as both autogamous as well as allogam. In self- pollination, the pollen masses fall from the opened anthers to the underlying sticky scar. Since the flowers secrete nectar in the spur, but also insect pollination is possible. From the eastern Mediterranean solitary bees of the genus Anthophora are detected as pollinators. The fruit set is about 80 %.
Plants may in unfavorable ( dry ) years and below ground bloom ( cleistogamy ).
Distribution and location
The main distribution area of this particular heat- requiring type is in the Mediterranean. To the north of Violet Dingel penetrates to Belgium, Germany and the Czech Republic to the east to the Caucasus and Iran.
- In Germany the Violet Dingel is only found at a few sites in the Upper Rhine and in the southern Eifel. It is very rare in single copies he steps outside of these regions - and then usually only for a short time - on, for example in the Rems valley.
- In Austria rare to very rare on the hill and under montane zone. Preferred sub-Mediterranean climate. Occurrence in Burgenland, Vienna (!), Lower Austria, Upper Austria, Styria, Carinthia, Salzburg (?). The species is critically endangered.
- In Switzerland, the major distribution areas are located in the cantons of Ticino, Jura, Valais and in the Rhine valley near Chur, but again, the species is rare.
As the site preferably the lime-loving plant bright, summer warm, dry pine and oak forests and poor grass. After Ellenberg the Violet Dingel Verbandscharakterart the central European subozeanischen, drought -carrying mixed oak forests is ( Quercion pubescenti - petraeae ).
Risk / protective
In Germany the Violet Dingel is threatened with extinction. He is on the red list of endangered species at level 1 and is particularly protected.
Nutrition
Although the plants contain chlorophyll and carry out photosynthesis, this is not sufficient to compensate for the breathing losses. The Purple Dingel is therefore dependent on food to be supplied by its root fungi, mainly ectomycorrhizal fungi of the genus Russula ( russulas ). So that the manner is one of the mykoheterotrophen plants.