Cyperaceae
Bulbostylis

Bulbostylis lacunosa (Lye) Lye

First published in Nordic J. Bot. 28: 517 (2010)
This species is accepted
The native range of this species is N. Zambia. It is an annual and grows primarily in the seasonally dry tropical 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: threatened. Confidence: confident
[AERP]

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
Zambia, Mbala Dist., pans 12 km S of Mbala (Abercorn), 18.iii.1962, Robinson 5050 (MT holotype, K).
Morphology General Habit
Tufted erect annual up to 20 cm tall; root system small
Morphology Leaves
Leaf sheaths straw-coloured, orifice sloping with long flexuous hairs, ligule 0; leaf blades few, short, 10–30 × 0.2–0.4 mm, margins scabrous, midrib prominent, 1–2 lateral nerves on lower side
Morphology Culms
Culms 5–20 cm, ridged and furrowed, scabridulous or sparsely pubescent
Morphology Reproductive morphology Inflorescences
Inflorescence unispicate, occasionally 1–3 spikelets; bracts 1–2, 4–10 mm long, basally glume-like, white-fringed, minutely scabrid, extending into prominent awn
Morphology Reproductive morphology Inflorescences Spikelets
Spikelet 4–8 × 2–3.5 mm, ovate to ovate-triangular, apex acute
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes spiral, 2.5–3 × 1–1.5 mm, ovate, brown, minutely scabrid to almost glabrous, margins shortly ciliate, apex obtuse to emarginate
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 2–3
Morphology Reproductive morphology Flowers Gynoecium Style
Style glabrous, dark brown basally, style base round, vertically flattened, not persistent on nutlet, branches 3
Morphology Reproductive morphology Fruits
Nutlet 0.8–1 × 0.6–0.7 mm; subtrigonous, obpyriform, base pedunculate, whitish, surface foveate (lacunose).
Distribution
Only known from N Zambia.
Ecology
Damp lateritic soils; c. 1350 m.
Conservation
Endemic to a small area in NE Zambia; possibly Vulnerable.
[FZ]

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

  • Herbarium Catalogue Specimens

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

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2026. 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 2026. 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