Bouteloua Lag.
  • Varied. Ci. 2(4): 134 (1805) 


Notes: Distribution: America

General Description

HABIT Annual (4), or perennial (21). Rhizomes absent (23), or short (1), or elongated (1). Stolons absent (22), or present (5). Culms erect (12/16), or geniculately ascending (6/16), or decumbent (4/16), or rambling (2/16); slender (6/8), or weak (2/8); 5-45.14-200 cm long. Lateral branches sparse (1/2), or ample (1/2). Ligule an eciliate membrane (1), or a ciliolate membrane (2), or a ciliate membrane (3), or a fringe of hairs (19). Leaf-blades filiform (1), or linear (24); stiff (4), or firm (21). INFLORESCENCE Inflorescence composed of racemes; exserted, or embraced at base by subtending leaf (2). Racemes borne along a central axis; erect (1), or ascending (19), or spreading (4), or deflexed (4); linear (16), or oblong (1), or cuneate (8); unilateral; bearing 1 spikelet (4), or few fertile spikelets (12), or many spikelets (9); bearing 1-5-20 fertile spikelets on each. Central inflorescence axis unspecialized (24), or flattened (1); tip without extension (8), or subulate (14), or filiform (3). Rhachis deciduous from axis; flattened (4), or angular (17), or subterete (4); terminating in a barren extension; extension subulate (18), or bristle-like (5), or a forked bristle (2). Spikelet packing broadside to rhachis; contiguous (22), or lax (3). Raceme-bases brief (23), or linear (2). Spikelets appressed (19), or ascending (5), or pectinate (1); solitary. Fertile spikelets sessile. STERILE SPIKELETS Basal sterile spikelets absent (21), or rudimentary (1), or well-developed (3); persistent (3/4), or deciduous with the fertile (1/4). FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension (1), or with diminished florets at the apex. Spikelets lanceolate (3), or elliptic (1), or cuneate (21); laterally compressed; 2.5-6.439-12 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus glabrous (1/3), or pubescent (1/3), or pilose (2/3). Floret callus glabrous (1/3), or pubescent (1/3), or pilose (1/3), or bearded (1/3). GLUMES Glumes shorter than spikelet (15), or reaching apex of florets (10), or exceeding apex of florets (4); thinner than fertile lemma (21), or similar to fertile lemma in texture (4); parallel to lemmas (4), or gaping (21). Lower glume subulate (1), or linear (2), or lanceolate (22); 0.3-0.6486-1 length of upper glume; membranous; 1-keeled (24/24); 1 -veined. Lower glume lateral veins absent. Lower glume surface smooth, or asperulous (1), or scabrous (1); glabrous (20), or puberulous (1), or pubescent (4), or villous (1), or hispidulous (1), or hispid (1). Lower glume apex acute (10/24), or acuminate (19/24), or attenuate (6/24), or setaceously attenuate (6/24); muticous (24/24), or mucronate (1/24). Upper glume lanceolate (24), or elliptic (1); 0.6-0.9156-1.3 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume primary vein eciliate (23), or ciliate (2). Upper glume surface smooth, or asperulous (1), or scabrous (1); glabrous (20), or puberulous (1), or pubescent (4), or villous (1), or hispidulous (1), or hispid (1). Upper glume apex entire (23), or dentate (2); 2 -fid (2/2); acute (9/23), or acuminate (20/23), or attenuate (5/23), or setaceously attenuate (4/23); muticous (23), or mucronate (1), or awned (2); 1 -awned (2/2). FLORETS Fertile lemma lanceolate (5), or elliptic (2), or oblong (1), or ovate (17); membranous (5), or cartilaginous (1), or coriaceous (19); without keel (2), or keeled (23); 3 -veined. Lemma surface smooth (23), or asperulous (1), or scabrous (2); glabrous (19), or puberulous (5), or pubescent (4), or villous (1); hairy on back (8/10), or on veins (1/10), or in lines (1/10). Lemma apex entire (6), or dentate (18), or lobed (2); 3 -fid (20/20); incised 0.33 of lemma length; acute (5/6), or acuminate (1/6); muticous (5), or mucronate (8), or awned (14); 2 -awned (1/20), or 3 -awned (19/20). Principal lemma awn apical (18/21), or from a sinus (3/21). Lateral lemma awns subequal to principal (8/14), or shorter than principal (6/14). Palea 0.8-0.9-1 length of lemma. Palea keels eciliate (24), or puberulous (1). Palea surface glabrous (22), or pubescent (2), or villous (1). Palea apex muticous (16), or with excurrent keel veins (8), or awned (2). Apical sterile florets 1 in number (24), or 2 in number (3), or 3 in number (1); male (4), or barren (21); separate (23), or in a clump (2); rudimentary (15), or linear (1), or lanceolate (2), or oblong (7), or cuneate (1). Apical sterile lemmas muticous (1), or awned. Apical sterile lemma awns glabrous (23), or ciliate (2). FLOWER Anthers 3 (7/7). FRUIT Caryopsis with adherent pericarp; ellipsoid (2/12), or oblong (1/12), or ovoid (5/12), or obovoid (4/12). Embryo 0.5-0.7339-0.9 length of caryopsis. DISTRIBUTION North America (22), or South America (13).

Distribution Map

 
  • Native distribution
  • Introduced distribution
Found in
  • Northern America Eastern Canada Ontario
  • Mexico Mexico Central
  • Mexico Gulf
  • Mexico Northeast
  • Mexico Northwest
  • Mexico Southeast
  • Mexico Southwest
  • North-Central U.S.A. Illinois
  • Iowa
  • Kansas
  • Minnesota
  • Missouri
  • Nebraska
  • North Dakota
  • Oklahoma
  • South Dakota
  • Wisconsin
  • Northeastern U.S.A. Connecticut
  • Indiana
  • Maine
  • Masachusettes
  • Michigan
  • New Jersey
  • New York
  • Ohio
  • Pennsylvania
  • West Virginia
  • Northwestern U.S.A. Colorado
  • Idaho
  • Montana
  • Oregon
  • Washington
  • Wyoming
  • South-Central U.S.A. New Mexico
  • Texas
  • Southeastern U.S.A. Alabama
  • Arkansas
  • Delaware
  • District of Columbia
  • Florida
  • Georgia
  • Kentucky
  • Louisiana
  • Maryland
  • Mississippi
  • North Carolina
  • South Carolina
  • Tennessee
  • Virginia
  • Southwestern U.S.A. Arizona
  • California
  • Nevada
  • Utah
  • Western Canada Alberta
  • British Columbia
  • Manitoba
  • Saskatchewan
  • Southern America Brazil Brazil North
  • Brazil Northeast
  • Brazil South
  • Brazil Southeast
  • Brazil West-Central
  • Caribbean Aruba
  • Bahamas
  • 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 Venezuela
  • Southern South America Argentina Northeast
  • Argentina Northwest
  • Argentina South
  • Paraguay
  • Uruguay
  • Western South America Bolivia
  • Colombia
  • Ecuador
  • Galápagos
  • Peru
Introduced into
  • Asia-Temperate Arabian Peninsula Saudi Arabia
  • China China North-Central
  • China South-Central
  • China Southeast
  • 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.