Төңкергіш мақташөп (Töŋkergiş maqtaşöp)

Species of flowering plant in the sedge family Cyperaceae

Speciesbox
| image = Eriophorum angustifolium upernavik 2007 08 01 1. jpg
| status = G5
| status system = TNC
| status ref =   and up to
Eriophorum angustifolium is described as "a rather dull plant" in winter and spring, but "simply breathtaking" in summer and autumn, when 1–7 conspicuous inflorescences – composed of hundreds of white pappi comparable to cotton, hair, tassels, and/or bristles – stand out against naturally drab surroundings. Eriophorum angustifolium differs from other species within the genus Eriophorum in its habitat and morphology. In North America, Eriophorum angustifolium is found in the north from Alaska through Manitoba and the Canadian Prairies to Newfoundland and Labrador, down the Pacific Northwest and the state of Washington, across the Midwestern United States through Michigan and Iowa, down the Eastern Seaboard as far south east as New York and New Jersey, and reaching as far south west as New Mexico. In Eurasia, E. angustifolium is distributed throughout the Caucasus, European Russia and North Asia, including Siberia and the Kamchatka Peninsula, and south east to Manchuria and Korea. and the white bristle like perianth, composed of achenes with pappi (seeds with hairs) then grows outwards to appear like short tufts of cotton thread. These pappi endure well into summer, lasting from around June to September. Like the pappus of Taraxacum (dandelions), this aids in wind dispersal, and also serves as thermal insulation, conserving the temperature of the plant's reproductive organs by trapping solar radiation. It is a known host to the fungal species Myriosclerotinia ciborium, Hysteronaevia advena, Lachnum imbecille and Lophodermium caricinum.

Eriophorum angustifolium has a NatureServe conservation status of G5, meaning that the species is considered to be ecologically secure by NatureServe, lacking any threats to its global abundance. resulted in Eriophorum angustifolium being announced as the County Flower of Greater Manchester.

The species was named Eriophorum angustifolium in 1782 by the German botanist Gerhard August Honckeny. The German botanist Albrecht Wilhelm Roth published this name in 1788, referring to Honckeny's work, and is sometimes erroneously considered the author of the species name. being based on a mixed batch of specimens. Scirpus angustifolius is a later combination published by the Japanese botanist Tetsuo Koyama in 1958, but this generic assignment is not widely accepted. Two subspecies are recognised within E. angustifolium. common cottonsedge, It is tolerant to chalybeate (iron enriched) water, but may succumb to powdery mildews.