Streptogyna P.Beauv.
  • Ess. Agrostogr.: 80 (1812) 


General Description

HABIT Perennial. Rhizomes absent (1), or elongated (1). Culms erect; 30-97.5-150 cm long. Ligule an eciliate membrane. Leaf-blade base with a false petiole. Leaf-blades lanceolate. Leaf-blade venation with distinct cross veins. INFLORESCENCE Inflorescence composed of racemes. Racemes single; unilateral. Rhachis semiterete. Spikelet packing broadside to rhachis; 1 -rowed. Spikelets appressed; solitary. Fertile spikelets pedicelled. FERTILE SPIKELETS Spikelets comprising 2-4 fertile florets; with diminished florets at the apex. Spikelets linear, or oblong; laterally compressed; 20-25-30 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; glabrous (1), or pubescent (1). GLUMES Glumes persistent; shorter than spikelet; thinner than fertile lemma. Lower glume lanceolate; 0.2-0.35-0.5 length of upper glume; scarious; 1-keeled; 3 -veined. Lower glume apex acute. Upper glume lanceolate; 1 length of adjacent fertile lemma; scarious; 1-keeled; 9 -veined (1), or 17 -veined (1). Upper glume lateral veins with cross-veins. Upper glume apex acute; mucronate. FLORETS Fertile lemma oblong; subterete; coriaceous; without keel; 9 -veined. Lemma surface glabrous (1), or pilose (1). Lemma margins convolute; covering most of palea. Lemma apex dentate; truncate; awned; 1 -awned. Principal lemma awn from a sinus. Palea keels contiguous above a sulcus. Apical sterile florets resembling fertile though underdeveloped. FLOWER Lodicules 3; membranous; ciliate; obtuse. Anthers 2. Stigmas 2-3 (1); papillose (1), or retrorsely barbellate (1). Ovary glabrous (1), or pubescent on apex (1). FRUIT Caryopsis with adherent pericarp; linear; isodiametric; biconvex; apex rostrate. Embryo 0.1 length of caryopsis. Hilum linear; 1 length of caryopsis. DISTRIBUTION Africa (1), or Tropical Asia (1), or North America (1), or South America (1).

  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.