Antennaria dioica
Ordinary Mountain Everlasting ( Antennaria dioica)
The Ordinary Mountain Everlasting ( Antennaria dioica), also known as common- or Zweihäusiges Everlasting Everlasting, is a flowering plant in the sunflower family ( Asteraceae). It is distributed in Eurasia.
- 5.1 Notes and references
- 5.2 Literature
Description
Vegetative characteristics
The Common Everlasting grows as an evergreen, perennial herbaceous plant, reaching heights of growth of about 5 to 20 cm ( 30 cm ). In the first year rosette of leaves is formed from the second year the plant is flowering size. It develops above ground, 2-5 cm long streamers. Through the leafy foothills of the rosettes often form dense mats.
The leaves are arranged in rosettes and distributed on the stem. The stalked, simple, einnervigen basal leaves have a length of 3 and 18 mm and a width of 3 to 6 mm spatula-shaped or diamond- spade-shaped leaf blade. The sessile stem leaves are linear - lanceolate with a length of 7 to 13 mm. The leaves are on the upper side glabrous to more or less glabrous, underside white- woolly - tomentose hairy.
Generative features
The flowering period extends from May to July. The Common Everlasting is incomplete dioecious dioecious getrenntgeschlechtig. In a terminal, trugdoldig heaping total inflorescence are three to twelve basket- shaped part inflorescences, which have a diameter of 5 to 8 mm. The female cups have oblong or lance-shaped, pink to purple- red bracts with pointed upper ends. The male baskets have wide, whitish to pink bracts with blunt upper ends. The bracts have pink to dark red appendage in males, rarely whitish in female specimens or in female specimens. A portion of the cups has female flowers with ciliated pseudostratified Pappus, the other with seemingly hermaphroditic flowers ( pen are available, but the ovary are infertile ) with single-row Pappus.
The achenes have a pappus.
The chromosome number is 2n 28
Ecology
The Common Everlasting is a sometimes pad forming Chamaephyt or Hemikryptophyt. The vegetative propagation places above ground, rooted, leafy foothills and contributes significantly to the overall increase. The hair is interpreted as transpiration.
The "basket flowers " are incompletely dioecious ie there are male plants specimens with sterile ovary. The stamens are irritable, they writhe in contact and thus drag the stamen tube down so that the pollen from the stationary stylus " pumped " is; This is an example of a thigmonasty. Pollinators are moths.
The achenes with a pappus subject to wind spread as Schirmchenflieger. The trockenhäutigen bracts are hygroscopic and separating: only in dry weather. Fruit ripening begins in August. The Common Everlasting is a cold germinator.
Occurrence and risk
The Common Everlasting is eurasia table spread in southern Europe only in the mountains. As sites are low in calcium, preferably sandy loam soils as they occur on silicate skimmed grasslands, heaths and pine forests. The Ordinary Cat's rising up in high altitudes of 2400 meters, the subalpine to alpine altitude levels are populated primarily. In the plane of the herd is declining. The Common Everlasting is considered acid pointer.
In Austria the ordinary cat's is scattered in all federal states. In Switzerland, this species is common in the Alps, the Central Plateau.
In Germany the ordinary cat's is considered endangered (Level 3 Red List ). As this was due to the eutrophication of soils is considered by emissions and fertilizer.
Others
By the heyday it is often referred to as " Ascension Blümchen". Recently, this species is also increasingly offered in wildflowers sown. For wild plants gardens, it is well suited.
The plant drug is rarely used as a remedy for bronchitis and biliary disorders.