Urochloa echinolaenoides Stapf

First published in D.Oliver & auct. suc. (eds.), Fl. Trop. Afr. 9: 595 (1920)
This species is accepted
The native range of this species is Tanzania to S. Tropical Africa. It is an annual and grows primarily in the seasonally dry tropical biome.

Descriptions

Morphology General Habit
Annual; caespitose. Culms 30-100 cm long. Ligule a fringe of hairs. Leaf-blades 3-20 cm long; 2-12 mm wide.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 2-7; borne along a central axis; unilateral; 2-6 cm long. Central inflorescence axis 1-7 cm long. Rhachis angular; setose on margins. Rhachis hairs dark brown; 3-7 mm long. Spikelet packing abaxial; regular; 3-4 -rowed. Spikelets pectinate; solitary, or in pairs. Fertile spikelets sessile and pedicelled. Pedicels setose.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; compressed strongly; plano-convex; acuminate; 3.5-5.5 mm long; falling entire.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; compressed strongly; plano-convex; acuminate; 3.5-5.5 mm long; falling entire.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 0.25-0.5 length of spikelet; membranous; without keels; 3-5 -veined. Lower glume surface glabrous, or pilose; with tubercle-based hairs. Lower glume apex acute, or acuminate. Upper glume elliptic; 1 length of spikelet; membranous; without keels; 5-7 -veined. Upper glume surface glabrous, or pubescent. Upper glume margins setose. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets male; with palea. Lemma of lower sterile floret similar to upper glume; elliptic; 1 length of spikelet; membranous; 5-7 -veined; setose; hairy on veins; bearing dark brown hairs; acute. Fertile lemma oblong; dorsally compressed; 3-4 mm long; indurate; without keel. Lemma surface papillose. Lemma margins involute. Lemma apex obtuse; mucronate. Principal lemma awn 0.5 mm long overall. Palea indurate.
Distribution
Africa: west-central tropical, east tropical, and southern tropical.
Reference
Paniceae. FTEA.
[GB]

Gramineae, W. D. Clayton, S. M. Phillips & S. A. Renvoize. Flora of Tropical East Africa. 1974

Morphology General Habit
Tufted annual; culms 30–100 cm. high.
Morphology Leaves
Leaf-blades linear, 3–20 cm. long, 2–12 mm. wide.
Morphology Reproductive morphology Inflorescences
Inflorescence of 2–7 racemes on a common axis 1–7 cm. long; racemes 2–6 cm. long, bearing single or paired spikelets, the rhachis and pedicels fringed with copious stiff tubercle-based brown bristles 3–7 mm. long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets lanceolate, 3.5–5.5 mm. long, acuminate; lower glume ovate, 1/4 to almost 1/2 as long as the spikelet, acute to acuminate; upper glume glabrous or hispidulous; lower lemma with bristles on the lateral nerves; upper lemma papillose with a mucro 0.5 mm. long.
Habitat
Deciduous bushland and wooded grassland; 800–2000 m.
Distribution
T1 T4 T7
[FTEA]

Gramineae, W. D. Clayton. Flora Zambesiaca 10:3. 1989

Morphology General Habit
Annual.
Morphology Culms
Culms 30–100 cm. high.
Morphology Reproductive morphology Inflorescences
Inflorescence of 2–7 racemes, these 2–6 cm. long bearing single or paired spikelets on a subtriquetrous rhachis fringed by copious stiff brown tubercle-based bristles 3–7 mm. long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets 3.5–5.5 mm. long, lanceolate, bristly on the nerves of the inferior lemma.
Morphology Reproductive morphology Inflorescences Bracts Glume
Inferior glume 1/4 to almost 1/2 length of spikelet, ovate.
Inferior
Inferior glume 1/4 to almost 1/2 length of spikelet, ovate.
Morphology Reproductive morphology Inflorescences Bracts Lemma
Superior lemma granulose, with a mucro 0.5 mm. long.
Superior
Superior lemma granulose, with a mucro 0.5 mm. long.
[FZ]

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]

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 Tropical East Africa

    • Flora of Tropical East Africa
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • 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
  • 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 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