Leontodon oxylepis
| Leontodon oxylepis | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Herbarium evidence Natural History Museum in London |
||||||||||||
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Leontodon oxylepis | ||||||||||||
| Boiss. & Hero. |
Leontodon oxylepis is a species from the genus Leontodon , which iscloseto Leontodon graecus and Leontodon kotschyi in terms of its characteristics.
description
Vegetative characteristics
Leontodon oxylepis is a perennial, stiff-haired herbaceous plant . It forms a long spindle, strong, vertical taproot . The stems are erect. The numerous leaves are arranged in a basal rosette, narrow, elongated, lanceolate, gradually narrowing into the short stalk, deeply pinnately to deeply indented and evenly covered on both sides with 7 to 11-rayed star hairs of very different lengths. The length of the largest * / - 1050 μm, the medium and small ones 310 to 330 μm, 570 to 750 μm is the span of the rays, which overlap in several layers and thus form a dense star hair felt that gives the leaves of living plants their typical whitish color - gives green appearance. The stem is not thickened below the head and is covered by star hairs of different lengths but generally shorter and thinner than on the leaves. The star hairs are evenly distributed on the outermost bracts, on the rest they are closer along the edges and on the median strip. In some plants there are also short, irregular star hairs as the edge of the otherwise star hairless bracts.
Generative characteristics
Leontodon oxylepis has medium-sized heads that nod in front of the anthesis . The inflorescence is elongated lanceolate. The inner bracts are glabrous or hairy on the middle veins, the outer bracts are hairy on the edge with dense star hairs. The achenes are all shaped the same, cylindrical. The pappus is formed with densely feathery bristles.
The number of chromosomes is 2n = 8.
distribution
Western Taurus, Middle Taurus, Lebanon, Palestine. Occurs in Turkey at altitudes between 870 and 2600 meters. The species is an Irano-Turanian floral element.
Habitat
Occurs on stony slopes and rocks as well as in areas with low shrubbery.
Synsociology
The species is part of the Astragalo-Brometea dry grassland in Turkey. As an introgressive species, it can also be found at initial locations in the snow valleys of the Muscari bourgaei-Ornithogaletum brevipedicellati.
Taxonomy
The species was discovered by Boissier and Heldreich in 1849 in Diagn. P. Orient. ser 1, 11:40 first described. The species is close to Leontodon graecus from southern Greece and Leontodon kotschyi from the Elburs Mountains in Iran.
literature
- Edmond Boissier 1875: Flora Orientalis . Vol. 3, Calyciflorae - Gamopetalae, Geneva. Pp. 731-732
Individual evidence
- ↑ Helga Pittoni 1974: Hairiness and chromosome numbers of star-haired Leontodon clans. Phyton, 16, 165-188
- ↑ Pittoni, H. 1974, p. 174
- ↑ Pittoni, H. 1974, p. 174
- ^ Edmond Boissier 1875: Fora Orientalis. Vol. 3, Calyciflorae - Gaopetalae, Geneva. P. 731
- ↑ H. Pittoni 1974. p. 181
- ↑ Özkan Eren, Mustafa Gökçeoğlu and Gerald Parolly 2004: The flora and vegetation of Bakirli Dagi (Western Taurus Mts, Turkey), including annotations on critical taxa of the Taurus range. Willdenowia, 34.
- ^ Meusel, H. & Jäger, E. 1991: Comparative chorology of the Central European flora. Volume III, Gustav Fischer. Here p. 305
- ↑ H. Kürschner, G. Parolly, E. v. Raab-Straube 1998: Phytosociological studies on high mountain plant communities of the Taurus Mountains (Turkey) - §. Snow patch and meltwater communities . Feddes Repertorium, 109, 7-8: 581-616. Here p. 596
- ^ Arne Strid & Kit Tan (1991): Mountain Flora of Greece. Edinburgh University Press, Edinburgh. Here p. 531