Persicaria salarkhanii
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Persicaria salarkhanii is a species of knotweed ( Persicaria ) in the knotweed family . She is only known from Bangladesh . In the Rangamati District in the Chittagong Hill Tracts , the fleshy leaves are consumed as vegetables.
description
Persicaria salarkhanii is a perennial shrubby undergrowth that can reach a height of 2 meters. Its upright and more than two centimeters thick trunks have a green and smooth surface, the branches are slender. The smooth petioles are up to an inch long, sometimes with two auricles at the base. The thick, lanceolate and entire or notched leaf blades have a length of up to 14 and a width of up to five centimeters. Their upper side is dark green and glandular, the lower side is glaucous . The ochrea is a smooth membrane up to six millimeters long. The flowers, which appear from October to January, are attached to flower stalks up to four millimeters long. The five white tepals are 3.5 to four millimeters long. The eight stamens are two to three millimeters long and each carry 1 to 1.2 millimeters long purple or pink anthers . The egg-shaped ovary is three and a half to four millimeters long and divided into three. The fleshy berries, measuring up to four by four millimeters, are pitch black when ripe. Its seeds are triangular with a size of three by two millimeters, their surface is black with a reticulate structure.
Persicaria salarkhanii is similar to the species Persicaria chinensis , but can be distinguished by its upright branches more than two centimeters thick, its thick leaves, the up to four millimeter long flower stalks and the pitch-black berries.
distribution
The holotype of Persicaria salarkhanii was collected in November 1986 in the Botanical Garden of the University of Dhaka. It was originally found in the Chimbuk Hills in the Bandarban district ( 21 ° 49 ′ 13.1 ″ N , 92 ° 22 ′ 46.6 ″ E ) in the Chittagong division in southeast Bangladesh. Further natural localities lie in hilly areas of the districts of Chittagong and Rangamati and in the District of Sylhet of Sylhet division in the northeast of the country. Persicaria salarkhanii is considered one of the few endemics of Bangladesh. Deviating information, according to which the species also occurs in India, China and Myanmar , are incorrect. In the Rangamati district of the Chittagong Hill Tracts , the leaves are consumed as vegetables.
Systematics
Persicaria salarkhanii was placed in the genus Ampelygona when it was first described, which is closely related to the bird knotweed ( Polygonum ) and the knotweed ( Persicaria ). Ampelygonum was synonymous with Persicaria in 2009 , in this genus Persicaria salarkhanii belongs to the section Cephalophilon. The genus knotweed ( Persicaria ) is distributed with more than 100 species in the temperate latitudes of the northern hemisphere to the tropics. It belongs to the tribe Persicarieae in the subfamily Polygonoideae within the knotweed family (Polygonacea).
Initial description
The first description of Ampelygona salarkhanii in 1991 by the botanist Md. Abul Hassan from the University of Dhaka , which the study of Bangladeshi Polygonum (genus Polygonum discovered a kind), while Persicaria chinensis is similar, but differs from this in terms of habit, flower stalk and fruits are different. The holotype was collected by Hassan in November 1986 in the Botanical Garden of the University of Dhaka. It is in the collection of the Bangladesh National Herbarium in Dhaka . The species name salarkhanii honors the Bangladeshi botanist Mohammad Salar Khan from the University of Dhaka as a pioneer of vascular plant taxonomy in Bangladesh.
Individual evidence
- ↑ a b c d e Md. Abul Hassan: A new species of Ampelygona Lindley (Polygonaceae) from Bangladesh . In: Bangladesh Journal of Botany 1991, Volume 20, No. 2, pp. 245-248, ZDB -ID 430153-5 .
- ↑ Maksuda Khatun et al .: Taxonomy of the Leafy Vegetables in Bangladesh . In: Bangladesh Journal of Plant Taxonomy 2013, Volume 20, No. 1, pp. 95–123, here p. 100, doi: 10.3329 / bjpt.v20i1.15469 .
- ↑ M. Atiqur Rahman and M. Enamur Rashid: Status of endemic plants of Bangladesh and conservation management strategies . In: International Journal of Environment 2013, Volume 2, No. 1, pp. 231–249, doi: 10.3126 / ije.v2i1.9224 .
- ↑ Gabriele Galasso et al .: Molecular phylogeny of Polygonum L. sl (Polygonoideae, Polygonaceae), focusing on European taxa: preliminary results and systematic considerations based on rbcL plastidial sequence data . In: Atti della Società italiana di Scienze naturali e del Museo civico di Storia naturale di Milano 2009, Volume 150, No. I, pp. 113-148, ZDB -ID 211811-7 .