Brachyachne (Benth.) Stapf
  • Hooker's Icon. Pl. 31: t. 3099 (1922) 


Notes: Distribution: Trop. Africa to Botswana, Malesia to Australia

General Description

HABIT Annual (8), or perennial (1). Stolons absent (8), or present (1). Culms erect (5/8), or geniculately ascending (1/8), or decumbent (2/8), or prostrate (1/8); slender (1/1); 5-28.22-70 cm long; without nodal roots (1/2), or rooting from lower nodes (2/2). Lateral branches lacking (2/3), or ample (1/3). Ligule an eciliate membrane (2), or a ciliolate membrane (6), or a ciliate membrane (1). Leaf-blades filiform (2), or linear (6), or lanceolate (1); stiff (1), or firm (8). Leaf-blade margins cartilaginous (1/1). INFLORESCENCE Inflorescence composed of racemes; subtended by an unspecialized leaf-sheath (8), or a spatheole (1); exserted (8), or embraced at base by subtending leaf (1), or enclosed (1). Spatheole lanceolate (1/1). Racemes single (2), or paired (1), or digitate (6); unilateral. Rhachis persistent (6/7), or deciduous from axis (1/7); flattened. Spikelet packing broadside to rhachis; crowded; 2 -rowed. Spikelets appressed; solitary. Fertile spikelets sessile. FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension (4), or with a barren rhachilla extension (5). Spikelets elliptic (1), or oblong; laterally compressed; 1.8-3.17-5.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent (1/2), or pilose (1/2). GLUMES Glumes deciduous; exceeding apex of florets; similar to fertile lemma in texture (1), or firmer than fertile lemma (8). Lower glume lanceolate (1), or elliptic (1), or oblong (7); 1 length of upper glume; hyaline (1), or membranous (2), or cartilaginous (1), or coriaceous (5); without keels (1), or 1-keeled (8); wingless (8), or winged on keel (1); 1 -veined. Lower glume lateral veins absent. Lower glume surface convex (8), or grooved on either side of midvein (1); glabrous (8), or pilose (1). Lower glume apex obtuse. Upper glume elliptic (2), or oblong; 1.2-1.6-2.5 length of adjacent fertile lemma; membranous (2), or cartilaginous (1), or coriaceous (5), or indurate (1); with undifferentiated margins (7), or hyaline margins (1), or membranous margins (1); without keels (1), or 1-keeled (8); wingless (8), or winged on keel (1); 1 -veined. Upper glume surface smooth (8), or asperulous (1); glabrous (7), or pilose (2). Upper glume apex obtuse. FLORETS Fertile lemma elliptic (2), or oblong (2), or ovate (6); laterally compressed; hyaline (1), or membranous (8); keeled; 3 -veined. Lemma midvein eciliate (3), or ciliate (4), or pubescent (2). Lemma surface glabrous (6), or puberulous (1), or pubescent (2); without hair tufts (7), or with marginal hair tufts (1), or with tufts of hair on midvein (1), or with a transverse fringe of hair (1). Lemma margins eciliate (2), or ciliate (6), or pubescent (1). Lemma apex entire (8), or dentate (1); 2 -fid (1/1); emarginate (2), or truncate (2), or obtuse (7); muticous (5), or mucronate (4). Palea 0.8-0.9-1 length of lemma; hyaline (1), or membranous (8); 2 -veined. Palea keels separated (7), or approximate (2); wingless (8), or winged (1); smooth (7), or scaberulous (2); eciliate (2), or pubescent (1), or ciliolate (1), or ciliate (5). FLOWER Anthers 3 (6/6). FRUIT Caryopsis with adherent pericarp (7/7); ellipsoid (2/4), or ovoid (1/4), or obovoid (1/4); pitted (1/1). Embryo 0.5-0.625-0.75 length of caryopsis. DISTRIBUTION Africa (5), or Tropical Asia (1), or Australasia (4).

Distribution Map

 
  • Native distribution
Found in
  • Africa East Tropical Africa Kenya
  • Tanzania
  • Uganda
  • Northeast Tropical Africa Chad
  • South Tropical Africa Angola
  • Malawi
  • Zambia
  • Zimbabwe
  • Southern Africa Botswana
  • West Tropical Africa Benin
  • Burkina
  • Ghana
  • Ivory Coast
  • Mali
  • Nigeria
  • Senegal
  • Sierra Leone
  • Togo
  • West-Central Tropical Africa Central African Republic
  • Zaire
  • Asia-Tropical Malesia Jawa
  • Lesser Sunda Is.
  • Papuasia New Guinea
  • Australasia Australia New South Wales
  • Northern Territory
  • Queensland
  • South Australia
  • 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.