Schoenus nigricans L.

First published in Sp. Pl.: 43 (1753)
This species is accepted
The native range of this species is Cosmopolitan. It is a perennial and grows primarily in the temperate biome.

Descriptions

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation
Predicted extinction risk: not threatened. Confidence: confident
[AERP]

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/164511/13553777

Conservation
LC - least concern
[IUCN]

J. Browning, K.D. Gordon-Gray†, M. Lock, H. Beentje, K. Vollesen, K. Bauters, C. Archer, I. Larridon, M. Xanthos, P. Vorster, J. Bruhl, K. Wilson and X. Zhang (2020). Flora Zambesiaca Volume: 14: Cyperaceae. M.Á. García, J.R. Timberlake (Eds). Kew Publish

Type
Europe, “In Europae paludibus aestate, exsiccatis”, Herb. Linn. 68.5, 68.6 (LINN).
Morphology General Habit
Densely tufted perennial, 60–100 cm tall; roots 1.2–1.5 mm wide; leaf bases 7–8 cm long, dark brown to black shiny
Morphology Leaves
Leaves shorter than culms; blade c. 40 cm long × 0.5 mm wide, stiff, scabrid on margins towards apex
Morphology Culms
Culms, scapose, 1–2 mm wide, nodeless, trigonous
Morphology Reproductive morphology Inflorescences
Inflorescence terminal, 13–15 × 10–20 mm, a head of closely-packed, dark spikelets, subtended by 2 bracts, their bases sheathing, apices elongate, lower 35–90 mm long, exceeding upper in length
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets c. 10 mm long, bisexual, blackish, occasionally brown
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes distichous, usually 6, size increasing upwards to 6–8 mm long, keels minutely scabrous
Morphology Reproductive morphology Flowers Perianth
Perianth 3, minute scales
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3; anthers crested
Morphology Reproductive morphology Flowers Gynoecium Style
Style branches 3, ± style length
Morphology Reproductive morphology Fruits
Nutlet (1)3-perfected, white, ovoid, faintly trigonous, c. 1.5 mm long, surface topography smooth.
Distribution
Zambia, Zimbabwe. Cosmopolitan: North Africa (Algeria, Libya, Tunisia), Ethiopia, Somalia, D.R. Congo (Katanga), South Africa (Eastern Cape, KwaZulu-Natal, Free State, Mpumalanga, Northwest, Western Cape), but with a disjunct distribution.
Ecology
Inland in damp grassland bordering hot springs or at coast in ± sands of undulating dunes in coastal heath, or estuarine to riverine in fissures of wet rock outcrops; 300–1300 m.
Conservation
Not threatened.
[FZ]

M. Thulin et al. Flora of Somalia, Vol. 1-4 [updated 2008] https://plants.jstor.org/collection/FLOS

Morphology General Habit
Densely tussocky plant with few–many stems and numerous leafy shoots
Morphology Stem
Stems 15–70 cm long and 0.5–2 mm thick, almost terete with many rounded longitudinal ridges, glabrous
Morphology Leaves
Leaves from the basal 12 cm only; basal sheaths chestnut-brown to reddish brown, often glossy; blades mostly 10–40 cm long and 0.4–1 mm wide, flat or somewhat canaliculate, hard and wiry, minutely scabrid at least on margin near the tip
Morphology Reproductive morphology Inflorescences
Inflorescence a 5–20 mm wide and 10–15 mm long head of 5–20 crowded spikelets; largest involucral bract with a glume-like base and a 0.5–5 cm long green leafy awn
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets 5–15 x 2–4 mm, somewhat flattened with distichous glumes, usually 2–3-flowered; lowermost glumes much shorter than the uppermost
Morphology Reproductive morphology Inflorescences Bracts Glume
Largest glumes 7–8 mm long, reddish brown to almost black, minutely scabrid on midrib, otherwise glabrous
Morphology Reproductive morphology Flowers Perianth
Perianth-bristles very small or absent
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 3
Morphology Reproductive morphology Flowers Gynoecium Style
Style with 3 long strongly hairy stigmas
Morphology Reproductive morphology Fruits
Nutlet c. 1.5 mm long, obtusely trigonous, whitish, shiny.
Distribution
N1 North Africa, Europe, Middle East, America.
Ecology
Altitude probably between 1000 and 2000 m.
[FSOM]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0
  • Flora Zambesiaca

    • Flora Zambesiaca
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Flora of Somalia

    • Flora of Somalia
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Herbarium Catalogue Specimens

    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/
  • IUCN Categories

    • IUCN Red List of Threatened Species
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Science Photographs

    • Copyright applied to individual images