Английская Википедия:Hedinia tibetica
Шаблон:Short description Шаблон:Speciesbox
Hedinia is a monotypic genus of flowering plants belonging to the family Brassicaceae.[1] It only contains one known species, Hedinia tibetica.[2]
Description
They are annual herbaceous plants, Шаблон:Convert tall, with green stems which are procumbent (trailing) or ascending, they are densely hirsute (very hairy) with simple trichomes to 1.3 mm. The basal leaves are sparsely to densely pubescent, with a petiole (a leaf stalk supporting a blade) measuring Шаблон:Convert long. They are ciliate (with a fringe of marginal hairs). The leaf blades are ovate or narrowly oblong in outline, 1- or 2-pinnatisect (cut to the mid-rib), Шаблон:Convert long and Шаблон:Convert wide. The cauline leaves (on an aerial stems) are similar to the basal leaves, are reduced in size with divisions toward stem apex. The racemes (flower spikes) are bracteate throughout or rarely only basally. The distal (furthest) bracts are subsessile (having a very small stalk), sometimes adnate (grown from or closely fused) to the pedicel (stalk of a flower). The fruiting pedicel is straight, erect or ascending, Шаблон:Convert long. The sepals are oblong shaped, Шаблон:Convert long and Шаблон:Convert wide. The petals are obovate shaped, Шаблон:Convert long and Шаблон:Convert wide, with a claw (narrow part) 1.5 mm. The filaments (stalk of a stamen) are Шаблон:Convert long. The anthers are Шаблон:Convert long with 20-46 ovules per ovary. The fruit (or seed capsule) is broadly oblong, rarely oblong-linear or suborbicular in shape. They are Шаблон:Convert long and 3-5 mm wide. They are flat or slightly twisted, obtuse, slightly retuse (blunt ended), or rarely subacute at both ends. The valves are glabrous (hairless) or pubescent. The style is 0.3-0.8 mm. The seeds are light to dark brown in colour, oblong shaped, 0.8-1.1 long and 0.4-0.6 mm wide. They bloom between June and August, and fruiting between July-September.[3][4]
Taxonomy
The genus name of Hedinia is in honour of Sven Hedin (1865–1952), a Swedish geographer, topographer, explorer, photographer, travel writer and illustrator.[5] The Latin specific epithet of tibetica refers to Tibet, where the original plants were found.
It was first described and published in S.Hedin (edited), Southern Tibet (S. Tibet) Vol.6 Issue 3 on page 77 in 1922.[2]
Range and habitat
Its native range is from Central Asia to China and the Himalayas. It is found in the regions of China (in Qinghai and Xinjiang), East and West Himalayas, Kyrgyzstan, Nepal, Tadzhikistan and Tibet.[2]
It grows in sandstone gravel, on alpine meadows, steppe, scree and sandy slopes. They can be found at an altitude of Шаблон:Convert above sea level.[3][6] Including on the semi-shrub deserts of the upper slopes of the Qinghai-Xizang Plateau,[7] and the Tibetan Plateau.[8]
References
Other sources
- Sven Anders Hedin, Southern Tibet; Discoveries in Former Times Compared with My Own Researches in 1906-1908, Volume 6, Part 3
- ↑ Шаблон:Cite journal
- ↑ 2,0 2,1 2,2 Шаблон:Cite POWO
- ↑ 3,0 3,1 Шаблон:Cite web
- ↑ Шаблон:Cite book
- ↑ Шаблон:Cite book
- ↑ Шаблон:Cite journal
- ↑ De-Yuan Hong and Stephen Blackmore (Editors) Шаблон:Google books
- ↑ Du Zheng, Qingsong Zhang and Shaohong Wu (Editors) Шаблон:Google books
