Diheteropogon Stapf
  • Hooker's Icon. Pl. 31: t. 3093 (1922) 


Notes: Distribution: Trop. & S. Africa, Madagascar

General Description

HABIT Annual (2), or perennial (2). Rhizomes absent (3), or short (1). Culms erect (1/1); slender (1/1); 15-61.62-150 cm long. Ligule an eciliate membrane (3), or a ciliolate membrane (1). Leaf-blades filiform (1), or linear. INFLORESCENCE Synflorescence simple (3), or compound (2); scanty (2/2). Inflorescence composed of racemes; terminal (2), or terminal and axillary (3); subtended by an unspecialized leaf-sheath (2), or a spatheole (2). Spatheole lanceolate (2/2); herbaceous (2/2). Racemes paired. Rhachis fragile at the nodes. Rhachis internodes linear (3), or clavate (2). Rhachis internode tip crateriform. Raceme-bases filiform (2), or linear (3). Spikelets in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels linear (3), or clavate (1). STERILE SPIKELETS Basal sterile spikelets well-developed. Companion sterile spikelets well-developed; deciduous with the fertile. Companion sterile spikelet glumes muticous (2), or awned. FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets linear (2), or lanceolate (2); subterete (1), or dorsally compressed; 5-7.875-15 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus cuneate (2), or linear (2); pubescent (1), or pilose (3); base pungent; inserted. GLUMES Glumes firmer than fertile lemma. Lower glume linear (1), or lanceolate; coriaceous; 2-keeled. Lower glume intercarinal veins absent (3/3). Lower glume surface concave (1), or with a longitudinal median groove, or deeply depressed. Lower glume apex entire (3), or dentate (1); 2 -fid (1/1). Upper glume linear (1/3), or lanceolate (2/3); 3 -veined. Upper glume surface glabrous (3), or pubescent (1). FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret elliptic (1/1); hyaline; 0 -veined (1/3), or 2 -veined (2/3). Fertile lemma linear (2), or oblong (3); hyaline (3), or membranous (1); without keel; 3 -veined (3/3). Lemma margins eciliate (2), or ciliate (2). Lemma apex dentate (1), or lobed (3); 2 -fid; incised 0.2-0.34-0.66 of lemma length; awned; 1 -awned. Principal lemma awn from a sinus; bigeniculate. Column of lemma awn hispidulous (1), or puberulous (2), or pubescent (1), or hirtellous (1). Palea present (2), or absent or minute (3); hyaline (2/2); 2 -veined (2/2). Palea keels ciliolate (2/2). FLOWER Anthers 3 (1/1). DISTRIBUTION Africa.

Distribution Map

 
  • Native distribution
Found in
  • Africa East Tropical Africa Kenya
  • Tanzania
  • Northeast Tropical Africa Chad
  • Ethiopia
  • South Tropical Africa Angola
  • Malawi
  • Mozambique
  • Zambia
  • Zimbabwe
  • Southern Africa Botswana
  • Cape Provinces
  • Free State
  • KwaZulu-Natal
  • Lesotho
  • Namibia
  • Northern Provinces
  • Swaziland
  • West Tropical Africa Benin
  • Burkina
  • Gambia, The
  • Ghana
  • Guinea
  • Guinea-Bissau
  • Ivory Coast
  • Mali
  • Mauritania
  • Niger
  • Nigeria
  • Senegal
  • Togo
  • West-Central Tropical Africa Burundi
  • Cameroon
  • Central African Republic
  • Congo
  • Gabon
  • Zaire
  • Western Indian Ocean Madagascar

  Bibliography

  • 1 Govaerts, R.H.A. (2011). World checklist of selected plant families published update. Facilitated by the Trustees of the Royal Botanic Gardens, Kew.

 Information From

GrassBase - The Online World Grass Flora
http://www.kew.org/data/grasses-db/
Clayton, W.D., Vorontsova, M.S., Harman, K.T. and Williamson, H. (2006 onwards). GrassBase - The Online World Grass Flora. http://www.kew.org/data/grasses-db.html. [accessed 24 January 2012; 14:30 GMT]
  • A © Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
eMonocot
http://e-monocot.org
eMonocot. (2010, 1st November). Retrieved Wednesday, 8th February, 2012, from http://e-monocot.org.
  • B Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
World Checklist of Selected Plant Families
http://apps.kew.org/wcsp/
WCSP 2014. 'World Checklist of Selected Plant Families. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; http://apps.kew.org/wcsp/ Retrieved 2011 onwards
  • C See http://kew.org/about-kew/website-information/legal-notices/index.htm You may use data on these Terms and Conditions and on further condition that: The data is not used for commercial purposes; You may copy and retain data solely for scholarly, educational or research purposes; You may not publish our data, except for small extracts provided for illustrative purposes and duly acknowledged; You acknowledge the source of the data by the words "With the permission of the Trustees of the Royal Botanic Gardens, Kew" in a position which is reasonably prominent in view of your use of the data; Any other use of data or any other content from this website may only be made with our prior written agreement.