Rheum lhasaense
Rheum lhasaense | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Order: | Caryophyllales |
Family: | Polygonaceae |
Genus: | Rheum |
Species: | R. lhasaense
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Binomial name | |
Rheum lhasaense A.J. Li & P.K. Hsiao[1]
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Rheum lhasaense is a plant from eastern Tibet belonging to the genus Rheum in family Polygonaceae. It is a mid-sized rhubarb species with triangular leaves and spherical fruit.[1]
Taxonomy
The species was first collected in 1965,[2][3] but first described as a new species in 1983 in the Flora Xizangica.[4]
The holotype was collected in 1965 by 张永田 郎楷永, held by the PE herbarium in Xiangshan, and is numbered PE-884218-00000017.[2][3]
Description
It is a
The basal leaves have a 3–7 cm long
There are 1 or 2 small leaves on the stem (of the inflorescence) which have very tiny petioles with a short and membranous ochrea.[1]
The plant flowers in narrow greenish-purple
The 8-9mm in diameter fruit is round with two small wings at its sides. These wings are narrow, 1.5-2mm wide, and have longitudinal veins near their middle. The seeds are round to oval-shaped and around 5mm in diameter, making them large for a rhubarb species.[1]
Similar species
According to the 2003 key in the Flora of China, this species is distinguishable from other large-fruited species of Rheum: R. forrestii, R. likiangense and R. compactum, by having triangular-shaped leaves and purplish flowers, the others having white or yellowish flowers, and different shaped, never triangular, leaves.[5]
In the key in the 1989 Plants of Central Asia it is compared with R. pumilum, from which it chiefly differs by being larger in all aspects.[3]
Distribution
Initially it was only known to occur at a few sites near the city of
Ecology
It flowers from July to August, and fruits from September to October.[1]
Local names
It is known as qu zha in Tibet.[7] In Chinese it is known as 拉萨大黄, la sa da huang.[1]
Uses
It is inedible, but the roots are used in local Tibetian tradition as a medicinal plant for
In
References
- ^ a b c d e f g h i j Bojian (包伯坚), Bao; Grabovskaya-Borodina, Alisa E. (2003). "Rheum lhasaense". In Zhengyi (吴征镒), Wu; Raven, Peter H.; Deyuan (洪德元), Hong (eds.). Flora of China, Vol. 5. Beijing: Science Press. p. 345.
- ^ a b "Angiosperms, PE Herbarium Type Specimens". scratchpads.eu. Institute of Botany, Chinese Academy of Sciences. Retrieved 22 March 2019.
- ^ a b c Бородина, А.Е.; Грубов, В.И.; Грудзинская, И.А.; Меницкий, Ю.Л. (1989). Растения Центральной Азии. По материалам Ботанического института им. В.Л.Комарова. Вып. 9. Ивовые - Гречишные. Л. [Plants of Central Asia: plant collections from China and Mongolia, Vol. 9] (in Russian). Moscow: Издателство Академии Наук СССР. pp. 77–93.
- ^ a b "Species Catalogue of China, Plants". 中国 生物物种名录 植物卷 (in Chinese). Beijing: Science Press. 2017. Retrieved 15 March 2019.
- ^ Bojian (包伯坚), Bao; Grabovskaya-Borodina, Alisa E. (2003). "Rheum". In Zhengyi (吴征镒), Wu; Raven, Peter H.; Deyuan (洪德元), Hong (eds.). Flora of China, Vol. 5. Beijing: Science Press. p. 341.
- doi:10.15468/o3pvnh. Retrieved 21 March 2019.
- ^ PMID 23778119.
- ^ "CN104161748A - Application of rheum lhasaense extract A and B in preparation of biological preparation for reducing blood fat". Google Patents. Retrieved 22 March 2019.
- PMID 24027597.
- ISBN 9787117197922.