Ophiuros C.F.Gaertn.
  • Suppl. Carp.: 3 (1805) 


Notes: Distribution: NE. Trop. Africa, Trop. & Subtrop. Asia to N. Australia

General Description

HABIT Annual (2), or perennial (2). Culms erect (1/1); robust (2/2); 25-163.1-400 cm long. Lateral branches ample (1/1). Ligule an eciliate membrane. Leaf-blades linear (1), or lanceolate (2), or elliptic (1). Leaf-blade venation without cross veins (3), or with obscure cross veins (1). Leaf-blade margins cartilaginous (1/1). INFLORESCENCE Synflorescence simple (1), or compound (3); fastigiate (1/3), or fasciculate (2/3). Inflorescence composed of racemes; terminal and axillary; subtended by an unspecialized leaf-sheath (1), or a spatheole (3); exserted (3), or embraced at base by subtending leaf (1). Spatheole linear (3/3). Peduncle widened at apex (3/3). Racemes single; bilateral. Rhachis fragile at the nodes; subcylindrical and excavated. Spikelet packing abaxial; 2 -rowed. Rhachis internodes oblong. Rhachis internode tip transverse; crateriform. Spikelets sunken; in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels fused to internode. STERILE SPIKELETS Companion sterile spikelets represented by barren pedicels. FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; 2-3.009-4 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus base truncate; with central peg; attached transversely. GLUMES Glumes reaching apex of florets; firmer than fertile lemma. Lower glume oblong; coriaceous; without keels (2), or 2-keeled (2); wingless (3), or winged on keel (1); 7 -veined (3), or 8 -veined (2), or 9 -veined (3). Lower glume surface smooth, or cancellate (1), or areolate (2). Lower glume apex obtuse. Upper glume elliptic; membranous; 1-2 -veined (2), or 3 -veined. Upper glume apex obtuse. FLORETS Basal sterile florets male (1), or barren (3); with palea. Lemma of lower sterile floret lanceolate (2), or oblong (1), or ovate (1); hyaline; 2 -veined (1/1). Fertile lemma linear (1), or lanceolate (2), or ovate (1); hyaline; without keel; 0 -veined (1/1). Palea hyaline. FLOWER Anthers 3 (2/2). DISTRIBUTION Africa (1), or Temperate Asia (1), or Tropical Asia (3), or Australasia (1).

Distribution Map

 
  • Native distribution
Found in
  • Africa Northeast Tropical Africa Eritrea
  • Ethiopia
  • Sudan
  • Asia-Temperate China China South-Central
  • China Southeast
  • Hainan
  • Eastern Asia Nansei-shoto
  • Asia-Tropical Indian Subcontinent Assam
  • Bangladesh
  • East Himalaya
  • India
  • Laccadive Is.
  • Nepal
  • Pakistan
  • Sri Lanka
  • Indo-China Laos
  • Myanmar
  • Thailand
  • Vietnam
  • Malesia Jawa
  • Lesser Sunda Is.
  • Malaya
  • Philippines
  • Papuasia New Guinea
  • Australasia Australia Northern Territory
  • Queensland
  • Western Australia

  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.