Urochloa wittei (Robyns) Sosef

First published in Pl. Ecol. Evol. 149: 362 (2016)
This species is accepted
The native range of this species is DR Congo. 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]

Morphology General Habit
Annual. Culms geniculately ascending, or decumbent; 30-40 cm long; rooting from lower nodes. Culm-internodes terete; striate. Culm-nodes pubescent. Lateral branches ample. Leaf-sheaths mostly shorter than adjacent culm internode; without keel; striately veined; pubescent; with tubercle-based hairs. Ligule a fringe of hairs. Leaf-blades linear, or lanceolate; 2-6 cm long; 3-7 mm wide. Leaf-blade surface glabrous. Leaf-blade margins crenate; scabrous. Leaf-blade apex acuminate.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 5-6; borne along a central axis; unilateral; 1.5-2 cm long. Rhachis narrowly winged; 0.75 mm wide; pubescent on surface; ciliate on margins. Rhachis hairs purple. Spikelet packing crowded; regular; 2 -rowed. Spikelets solitary. Fertile spikelets sessile.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic, or oblong; dorsally compressed; compressed slightly; acuminate; 3.5 mm long; falling entire. Spikelet callus brief.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic, or oblong; dorsally compressed; compressed slightly; acuminate; 3.5 mm long; falling entire. Spikelet callus brief.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume lanceolate; 0.5 length of spikelet; membranous; without keels; 3 -veined. Lower glume surface pubescent. Lower glume apex acute. Upper glume elliptic; 1 length of spikelet; membranous; without keels; 5 -veined. Upper glume primary vein obscure. Upper glume lateral veins obscure. Upper glume surface pubescent. Upper glume margins villous. Upper glume hairs purple. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets male; with palea. Lemma of lower sterile floret similar to upper glume; oblong; 1 length of spikelet; 5 -veined; villous; bearing purple hairs; acuminate. Fertile lemma 2.5 mm long; indurate; pallid; without keel. Lemma surface punctate. Palea without keels.
Distribution
Africa: west-central tropical.
Reference
Paniceae. Fl Agrost Congo Belge 2000.
[GB]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0
  • GrassBase - The Online World Grass Flora

    • Clayton, W.D., Vorontsova, M.S., Harman, K.T. and Williamson, H. (2006 onwards). GrassBase - The Online World Grass Flora.
    • 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