Black Bog-rush
CR

Black Bog-rush

Schoenus nigricans

Unknown

Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Schoenus_nigricans

Overview

Schoenus nigricans is a species of sedge known by the common names black bog-rush and black sedge. It is native to Eurasia, parts of Africa, Australia, and southern North America, including Mexico and the southernmost United States.

Black Bog-rush faces severe decline primarily due to habitat loss and degradation of its specialized wetland environments. Drainage of bogs, fens, and wet meadows for agriculture and development has eliminated much of its suitable habitat, while remaining populations are threatened by changes in water levels and quality.

Threat summary

Habitat

S. nigricans grows in many types of wetlands and other moist and alkaline habitat, including marshes, springs, seeps, peat bogs, heath, and alkali flats.

Image:Schoenus nigricans Texas.jpg|Detail of mature fruiting head

TERRESTRIAL· major

Other threatened species in Cyperaceae

Round-headed Club-rushCR

Round-headed Club-rush

Scirpoides holoschoenus

Unknown
Flat-sedgeVU

Flat-sedge

Blysmus compressus

Unknown
Tufted Leafless-bulrushVU

Tufted Leafless-bulrush

Trichophorum cespitosum

Unknown
obtuse sedgeVU

obtuse sedge

Carex obtusata

Unknown

Frequently asked questions

Why is Black Bog-rush classified as Critically Endangered?
Black Bog-rush is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. Black Bog-rush faces severe decline primarily due to habitat loss and degradation of its specialized wetland environments. Drainage of bogs, fens, and wet meadows for agriculture and development has eliminated much of its suitable habitat, while remaining populations are threatened by changes in water levels and quality.
Where does Black Bog-rush live?
Black Bog-rush occurs in across multiple regions. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Black Bog-rush?
The main threats to Black Bog-rush are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

Get weekly conservation intelligence

One short digest a week of the most striking species and country data we ship, plus breaking conservation news paired with our database where it matters.

Free, no spam. One-click unsubscribe in every email.