Family:
Poaceae Barnhart
Genus:
Echinochloa P.Beauv.

Echinochloa obtusiflora Stapf

This species is accepted, and its native range is Senegal, N. Nigeria to Sudan.

[FWTA]

Gramineae, W. D. Clayton. Flora of West Tropical Africa 3:2. 1972

Morphology General Habit
Erect annual up to 1 m. high
Ecology
In shallow pools and wet places.

[GB]
Morphology General Habit
Annual; caespitose; clumped loosely. Culms geniculately ascending; 15-45 cm long; 2 -noded. Culm-internodes terete; smooth; distally glabrous. Lateral branches sparse. Leaf-sheaths tight; striately veined; smooth; glabrous on surface. Ligule a fringe of hairs. Leaf-blades 5-10 cm long; 2-3 mm wide. Leaf-blade venation with 19 secondary veins. Leaf-blade surface glabrous. Leaf-blade margins scabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 2-5; borne along a central axis; unilateral; 1-2.5 cm long. Central inflorescence axis 3-15 cm long. Rhachis angular; 0.75 mm wide; scabrous on margins. Spikelet packing regular; 4 -rowed. Spikelets in pairs. Fertile spikelets sessile.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; compressed slightly; obtuse; 2.2-3.4 mm long; falling entire. Spikelet callus oblong; incorporating lowest rhachilla internode with adnate lower glume; 0.5 mm long.
Fertile
Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; compressed slightly; obtuse; 2.2-3.4 mm long; falling entire. Spikelet callus oblong; incorporating lowest rhachilla internode with adnate lower glume; 0.5 mm long.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; clasping; 0.3-0.4 length of spikelet; membranous, or chartaceous; without keels; 5 -veined. Lower glume surface asperulous; rough above. Lower glume apex obtuse. Upper glume ovate; chartaceous; without keels; 5 -veined. Upper glume apex obtuse.
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; chartaceous; 5 -veined; obtuse. Fertile lemma elliptic; 2.2-3.4 mm long; indurate; pallid; shiny; without keel. Lemma surface striate. Lemma margins involute. Lemma apex apiculate. Palea reflexed at apex; indurate.
Morphology Reproductive morphology Flowers
Anthers 3; 2 mm long.
Distribution
Africa: west tropical, west-central tropical, and northeast tropical.
Reference
Paniceae. FTA 1998.

Native to:

Cameroon, Chad, Niger, Nigeria, Senegal, Sudan

Echinochloa obtusiflora Stapf appears in other Kew resources:

Date Reference Identified As Barcode Type Status Has image?
MacLeod, Miss [91], Cameroon K000282395 Yes

First published in D.Oliver & auct. suc. (eds.), Fl. Trop. Afr. 9: 606 (1920)

Accepted by

  • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
  • Darbyshire, I., Kordofani, M., Farag, I., Candiga, R. & Pickering, H. (eds.) (2015). The Plants of Sudan and South Sudan: 1-400. Kew publishing, Royal Botanic Gardens, Kew.
  • Hepper, F.N. (ed.) (1972). Flora of West Tropical Africa, ed. 2, 3(2): 277-574.
  • Lebrun, J.P. (1973). Énumération des plantes vasculaires du Sénégal: 1-209. Maisons Alfort: Institut d'élevage et de médecine vétérinaire des pays tropicaux.
  • Onana, J.M. (2011). The vascular plants of Cameroon a taxonomic checklist with IUCN assessments: 1-195. National herbarium of Cameroon, Yaoundé.
  • Peyre de Fabregues, B. & Lebrun, J.-P. (1976). Catalogue des Plantes Vascularies du Niger: 1-433. Institut d' Elevage et de Médecine Vétérinaire des Pays Tropicaux, Maisons Alfort.

Literature

Flora of West Tropical Africa

  • Berhaut, Fl. Sén. ed. 2, 406.
  • in F.T.A. 9: 606 (1920)

Kew Backbone Distributions

  • Hepper, F.N. (ed.) (1972). Flora of West Tropical Africa, ed. 2, 3(2): 277-574.
  • Lebrun, J.P. (1973). Énumération des plantes vasculaires du Sénégal: 1-209. Maisons Alfort: Institut d'élevage et de médecine vétérinaire des pays tropicaux.
  • Peyre de Fabregues, B. & Lebrun, J.-P. (1976). Catalogue des Plantes Vascularies du Niger: 1-433. Institut d' Elevage et de Médecine Vétérinaire des Pays Tropicaux, Maisons Alfort.

  • Flora of West Tropical Africa

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

  • 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 Selected Plant Families 2022. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

  • Kew Names and Taxonomic Backbone

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0