Leptochloa P.Beauv.
  • Ess. Agrostogr.: 71 (1812) 


Notes: Distribution: Trop. & Subtrop. to U.S.A.

General Description

HABIT Annual (14), or perennial (26). Rhizomes absent (34), or short (1), or elongated (2). Stolons absent (35), or present (2). Culms erect (19/28), or geniculately ascending (8/28), or decumbent (9/28); 10-81.97-270 cm long; firm (36), or wiry (1); without nodal roots (1/5), or rooting from lower nodes (5/5). Culm-internodes terete (4/4), or elliptical in section (2/4). Culm-nodes constricted (1/1). Lateral branches lacking (10/14), or sparse (9/14), or ample (2/14). Ligule an eciliate membrane (26), or a ciliolate membrane (6), or a ciliate membrane (4), or a fringe of hairs (1). Leaf-blades persistent, or deciduous at the ligule (1); filiform (1), or linear (34), or lanceolate (4), or oblong (1); herbaceous (36), or coriaceous (1); stiff (3), or firm (33), or flaccid (1); without exudate (36), or viscid (1). Leaf-blade midrib widened (2/2). Leaf-blade apex muticous (36), or pungent (1). INFLORESCENCE Inflorescence composed of racemes; terminal (36), or terminal and axillary (1); exserted (35), or embraced at base by subtending leaf (2). Racemes digitate (2), or borne along a central axis (35); erect (5), or ascending (34), or spreading (6), or deflexed (1); unilateral. Rhachis semiterete (30/30). Spikelet packing broadside to rhachis; crowded (3), or contiguous (28), or lax (9); 2 -rowed (27/27). Raceme-bases brief (36), or filiform (1). Spikelets solitary, or in pairs (1). Fertile spikelets sessile (27), or pedicelled (16). Pedicels filiform (3/6), or linear (2/6), or oblong (2/6). FERTILE SPIKELETS Spikelets comprising 1-5-15 fertile florets; without rhachilla extension (2), or with a barren rhachilla extension (2), or with diminished florets at the apex (33). Spikelets elliptic (15), or oblong (23), or ovate (1); laterally compressed; 1-4.618-15 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus brief (35), or evident (2); glabrous (2/8), or sparsely hairy (1/8), or pubescent (5/8), or bearded (1/8), or woolly (1/8). GLUMES Glumes persistent; shorter than spikelet (35), or reaching apex of florets (1), or exceeding apex of florets (3). Lower glume linear (2), or lanceolate (24), or oblong (4), or ovate (10); 0.3-0.7519-1 length of upper glume; membranous; without keels (1), or 1-keeled (36); 1 -veined. Lower glume lateral veins absent. Lower glume surface smooth, or asperulous (2). Lower glume apex obtuse (5/36), or acute (28/36), or acuminate (10/36); muticous (36), or mucronate (1), or awned (1). Upper glume lanceolate (12), or elliptic (8), or oblong (12), or ovate (8), or obovate (2); 0.5-0.9287-1.7 length of adjacent fertile lemma; membranous; without keels (1), or 1-keeled (36); 1 -veined, or 2-3 -veined (1). Upper glume surface smooth, or asperulous (2). Upper glume apex emarginate (3/34), or truncate (1/34), or obtuse (13/34), or acute (22/34), or acuminate (6/34), or cuspidate (1/34); muticous (32), or mucronate (6). FLORETS Fertile lemma elliptic (9), or oblong (27), or ovate (10), or obovate (1); membranous; without keel (6), or keeled (31); 3 -veined. Lemma midvein without distinctive roughness (34), or scaberulous (1), or scabrous (2); eciliate (17), or ciliate (4), or pubescent (18). Lemma lateral veins obscure (1/1); less than two thirds length of lemma (1/1). Lemma surface smooth (35), or scaberulous (1), or scabrous (1); glabrous (30), or puberulous (2), or pubescent (5), or villous (1); hairy on back (5/7), or on veins (3/7). Lemma margins eciliate (4), or ciliolate (6), or ciliate (5), or pubescent (21), or pilose (2), or villous (1). Lemma apex entire (28), or dentate (14); 2 -fid (14/14); emarginate (16/32), or truncate (3/32), or obtuse (12/32), or acute (7/32), or acuminate (4/32); muticous (24), or mucronate (14), or awned (7); 1 -awned (7/7). Principal lemma awn apical (17/19), or from a sinus (2/19). Palea 0.66-0.9017-1 length of lemma; hyaline (2), or membranous (35); 2 -veined (36/36). Palea keels smooth (31), or scaberulous (3), or scabrous (3); eciliate (20), or puberulous (5), or pubescent (1), or ciliolate (10), or ciliate (1). Palea surface glabrous (30), or puberulous (2), or pubescent (5). Apical sterile florets resembling fertile though underdeveloped (33/33). FLOWER Lodicules 2 (7/7); fleshy (6/6). Anthers 2 (2/20), or 3 (18/20). FRUIT Caryopsis with adherent pericarp (27/35), or tardily free pericarp (1/35), or free soft pericarp (7/35); ellipsoid (13/18), or oblong (9/18), or ovoid (2/18), or obovoid (1/18); isodiametric (8/12), or laterally compressed (1/12), or dorsally compressed (1/12), or flattened (2/12); biconvex (1/11), or plano-convex (2/11), or concavo-convex (3/11), or trigonous (5/11); rugose (2/2). Embryo 0.5-0.55-0.6 length of caryopsis. Hilum punctiform (1/1). DISTRIBUTION Africa (13), or Temperate Asia (6), or Tropical Asia (12), or Australasia (9), or Pacific (6), or North America (10), or South America (12).

Distribution Map

 
  • Native distribution
  • Introduced distribution
Found in
  • Africa East Tropical Africa Kenya
  • Tanzania
  • Uganda
  • Northeast Tropical Africa Chad
  • Eritrea
  • Ethiopia
  • Somalia
  • Sudan
  • South Tropical Africa Angola
  • Malawi
  • Mozambique
  • Zambia
  • Zimbabwe
  • Southern Africa Botswana
  • Caprivi Strip
  • KwaZulu-Natal
  • Namibia
  • Northern Provinces
  • Swaziland
  • West Tropical Africa Benin
  • Burkina
  • Ghana
  • Guinea
  • Guinea-Bissau
  • Ivory Coast
  • Mali
  • Niger
  • Nigeria
  • Senegal
  • Sierra Leone
  • Togo
  • West-Central Tropical Africa Cameroon
  • Central African Republic
  • Congo
  • Rwanda
  • Zaire
  • Western Indian Ocean Comoros
  • Madagascar
  • Asia-Temperate Arabian Peninsula Yemen
  • China China North-Central
  • China South-Central
  • China Southeast
  • Hainan
  • Eastern Asia Japan
  • Korea
  • Nansei-shoto
  • Ogasawara-shoto
  • Taiwan
  • Asia-Tropical Indian Subcontinent Bangladesh
  • East Himalaya
  • India
  • Pakistan
  • Sri Lanka
  • West Himalaya
  • Indo-China Cambodia
  • Laos
  • Myanmar
  • Thailand
  • Vietnam
  • Malesia Borneo
  • Jawa
  • Lesser Sunda Is.
  • Malaya
  • Maluku
  • Philippines
  • Sulawesi
  • Sumatera
  • Papuasia New Guinea
  • Australasia Australia New South Wales
  • Northern Territory
  • Queensland
  • South Australia
  • Western Australia
  • Northern America Mexico Mexico Central
  • Mexico Gulf
  • Mexico Northeast
  • Mexico Northwest
  • Mexico Southeast
  • Mexico Southwest
  • North-Central U.S.A. Illinois
  • Kansas
  • Missouri
  • Oklahoma
  • South Dakota
  • Northeastern U.S.A. Indiana
  • Masachusettes
  • New Jersey
  • Ohio
  • Pennsylvania
  • Northwestern U.S.A. Colorado
  • South-Central U.S.A. New Mexico
  • Texas
  • Southeastern U.S.A. Alabama
  • Arkansas
  • Florida
  • Georgia
  • Kentucky
  • Louisiana
  • Mississippi
  • North Carolina
  • South Carolina
  • Tennessee
  • Virginia
  • Southwestern U.S.A. Arizona
  • California
  • Nevada
  • Utah
  • Southern America Brazil Brazil North
  • Brazil Northeast
  • Brazil South
  • Brazil Southeast
  • Brazil West-Central
  • Caribbean Bahamas
  • Bermuda
  • Cayman Is.
  • Cuba
  • Dominican Republic
  • Haiti
  • Jamaica
  • Leeward Is.
  • Netherlands Antilles
  • Puerto Rico
  • Trinidad-Tobago
  • Venezuelan Antilles
  • Windward Is.
  • Central America Belize
  • Costa Rica
  • El Salvador
  • Guatemala
  • Honduras
  • Nicaragua
  • Panamá
  • Northern South America French Guiana
  • Guyana
  • Suriname
  • Venezuela
  • Southern South America Argentina Northeast
  • Argentina Northwest
  • Paraguay
  • Uruguay
  • Western South America Bolivia
  • Colombia
  • Ecuador
  • Galápagos
  • Peru
Introduced into
  • Africa Macaronesia Cape Verde
  • Northern Africa Egypt
  • West-Central Tropical Africa Burundi
  • Asia-Temperate Arabian Peninsula Saudi Arabia
  • Western Asia Cyprus
  • Palestine
  • Asia-Tropical Indo-China Andaman Is.
  • Nicobar Is.
  • Europe Middle Europe Czechoslovakia
  • Pacific North-Central Pacific Hawaii

  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.