Poaceae
Urochloa

Urochloa platyphylla (Munro ex C.Wright) R.D.Webster

First published in Syst. Bot. 13: 606 (1988)
This species is accepted
The native range of this species is Central & S. U.S.A., Cuba, Bolivia to N. Argentina. It is an annual and grows primarily in the seasonally dry tropical biome.

Descriptions

Bernal, R., Gradstein, S.R. & Celis, M. (eds.). 2015. Catálogo de plantas y líquenes de Colombia. Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá. http://catalogoplantasdecolombia.unal.edu.co

Distribution
Nativa en Colombia.
Morphology General Habit
Hierba
Conservation
No Evaluada
[CPLC]

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]

Distribution
Native to Colombia.
Habit
Herb.
[UPFC]

Morphology General Habit
Annual. Culms decumbent; 30-80 cm long; rooting from lower nodes. Leaf-sheaths glabrous on surface, or hirsute; outer margin hairy. Ligule a fringe of hairs. Leaf-blades 4-12 cm long; 6-13 mm wide. Leaf-blade surface glabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 2-6; borne along a central axis; unilateral; 3-6 cm long. Central inflorescence axis 8-18 cm long. Rhachis broadly winged; 1.6-2.3 mm wide. Spikelet packing adaxial; distant; regular; 2 -rowed. Spikelets solitary. Fertile spikelets pedicelled. Pedicels linear.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; compressed slightly; acute; 4-4.5 mm long; falling entire.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; compressed slightly; acute; 4-4.5 mm long; falling entire.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 0.25-0.33 length of spikelet; membranous; without keels; 5 -veined. Lower glume apex obtuse. Upper glume ovate; 4-4.5 mm long; 1.25-1.4 length of adjacent fertile lemma; 1 length of spikelet; membranous; without keels; 3-5 -veined. Upper glume lateral veins with cross-veins. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Basal sterile florets male; with palea. Lemma of lower sterile floret similar to upper glume; ovate; 1 length of spikelet; membranous; 5 -veined; with cross-veins; acute. Fertile lemma elliptic; 3.2-3.5 mm long; indurate; without keel. Lemma surface papillose. Lemma margins involute. Lemma apex obtuse. Palea involute; indurate; without keels.
Morphology Reproductive morphology Fruits
Embryo 0.5 length of caryopsis.
Distribution
Asia-temperate: eastern Asia. North America: north-central USA, south-central USA, and southeast USA. South America: Caribbean, western South America, and southern South America.
Reference
Paniceae. Gould.
[GB]

Sources

  • Angiosperm Extinction Risk Predictions v1

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

  • Catálogo de Plantas y Líquenes de Colombia

    • 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

    • 'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    • 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 2025. 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 2025. 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

  • Useful Plants and Fungi of Colombia

    • http://creativecommons.org/licenses/by-nc-sa/3.0