Leontodon asperrimus
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Leontodon asperrimus is a species of the genus Dandelion Leontodon within the sunflower family (Asteraceae). It is regarded as the vicarious Asian species of the Leontodon biscutellifolius, whichgrows in Europe.
description
Vegetative characteristics
Leontodon asperrimus is a perennial herbaceous plant that reaches heights of 13 to 35, rarely up to 45 centimeters. It forms a vertical taproot and upright, unbranched stems . The above-ground parts of the plant are very stiff-haired.
The numerous leaves are arranged in a basal rosette. With a length of 5 to 19 centimeters and 1 to 2.5 centimeters, the leaves are oblong-lanceolate, indistinctly serrated, with a strictly sharp-rough indument. The rarely three, mostly four, five to six-rayed star hairs are 900 to 1900 μm long with rays from 250 to 390 μm in length. The stem of the stronger hair is rough due to fine hooks.
Generative characteristics
Leontodon biscutellifolius has particularly large flower heads and achenes for the genus. The involucrum is 17 to 28 millimeters long, the bracts are +/- regular, arranged in scales, the outer with thick hair, the inner smooth. The bracts are, apart from small, single-row hairs of the same kind of star hairs as on the leaves, with a strong emphasis on longer and shorter multi-column, sometimes irregularly radiated, outer bracts and bract edges, which also look like fringed with the naked eye. Similar to Leontodon biscutellifolius , the hair stalks are sometimes fused together on the outer leaf margin; sometimes a series of star hairs on the spine of the bract.
The 15 to 18.5 millimeters long, brown achenes are all the same shape. The pappus consists of two rows of 16 millimeters long, feathery bristles that are dense to the base.
The number of chromosomes is 2n = 8.
Occurrence
Leontodon asperrimus is widespread in the northern Iraqi - Iranian - Anatolian region. In Iraqi Kurdistan , the species thrives at altitudes of 1200 to 2000 meters and in Iran from 1200 to 3000 meters. It is also common in the Talysh catchment area in the Azerbaijani Caucasus .
Dry grasslands are given as habitat .
Taxonomy
It was first published in 1803 under the name ( Basionym ) Scorzonera asperrima by Carl Ludwig Willdenow in Species Plantarum , 3, p. 1507. The new combination to Leontodon asperrimus was published by Pierre Edmond Boissier in Ball: Flora Orientalis , Volume 3, 1875.
swell
literature
- Helga Pittoni: Leontodon. In: Karl Heinz Rechinger (Ed.): Flora Iranica , Compiositae II - Lactuceae , Lfg. Nr. 122, June 1977, Akademische Druck- u. Verlagsanstalt Graz, 1977. Here pp. 126–127.
Individual evidence
- ↑ Helga Pittoni: Hairiness and chromosome numbers of star-haired Leontodon clans. In: Phyton , Volume 16, 1974, pp. 165-188. Here pp. 185–186.
- ↑ a b Helga Pittoni: Leontodon. In: Karl Heinz Rechinger (Ed.): Flora Iranica , Compiositae II - Lactuceae , Lfg. Nr. 122, June 1977, Akademische Druck- u. Verlagsanstalt Graz, 1977. Here pp. 126–127.
- ↑ Helga Pittoni: Hairiness and chromosome numbers of star-haired Leontodon clans. In: Phyton , Volume 16, 1974, pp. 165-188. Here pp. 177–178.
- ↑ Helga Pittoni: Hairiness and chromosome numbers of star-haired Leontodon clans. In: Phyton , Volume 16, 1974, pp. 165-188. Here p. 178 and p. 186.
- ↑ Helga Pittoni: Hairiness and chromosome numbers of star-haired Leontodon clans. In: Phyton , Volume 16, 1974, pp. 165-188. Here p. 186.
