Coelorachis Brongn.
  • L.I.Duperrey, Voy. Monde, Phan.: 64 (1831) 


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

General Description

HABIT Annual (1), or perennial (21). Rhizomes absent (19), or short (2), or elongated (1). Culms erect (13/13); robust (1/4), or slender (3/4); 10-120.2-400 cm long; firm (21), or wiry (1); with prop roots (1/1). Culm-internodes elliptical in section (3/3). Lateral branches lacking (2/9), or sparse (2/9), or ample (7/9). Ligule an eciliate membrane (12), or a ciliolate membrane (9), or a fringe of hairs (1). Leaf-blades filiform (1), or linear (21), or lanceolate (4); stiff (1), or firm (21). Leaf-blade margins cartilaginous (1/1). INFLORESCENCE Synflorescence simple (13), or compound (9); paniculate (4/8), or fastigiate (5/8). Inflorescence composed of racemes; terminal (4), or terminal and axillary (18); subtended by an unspecialized leaf-sheath (11), or a spatheole (11); exserted (14), or embraced at base by subtending leaf (9). Spatheole linear (11/11), or lanceolate (1/11). Peduncle widened at apex (9/9). Racemes single. Rhachis fragile at the nodes; angular (10), or semiterete (12). Rhachis internodes columnar (1), or oblong (2), or clavate (5), or cuneate (13), or pyriform (1); unspecialized (20), or with the lower often bearing triads (2). Rhachis internode tip transverse; flat (1), or crateriform (21). Spikelets sunken (12), or appressed (10); in pairs (21), or in threes (1). Fertile spikelets sessile; 1 in the cluster (21), or 2 in the cluster (2). Companion sterile spikelets pedicelled; 0 in the cluster (1), or 1 in the cluster. Pedicels free (21), or fused to internode (1); columnar (13), or oblong (7), or clavate (1), or cuneate (1), or inflated (1); tip rectangular (1/14), or cupuliform (13/14). STERILE SPIKELETS Companion sterile spikelets rudimentary (14), or well-developed (12); persistent (3/21), or deciduous with the fertile (9/21), or fused to and deciduous with fertile spikelet belonging to segment above (1/21), or separately deciduous (9/21). Companion sterile spikelet callus indistinct (21), or square (1). FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic (1), or oblong (10), or ovate (11), or obovate (1); dorsally compressed; 2.158-4.248-7 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus glabrous (4/6), or pubescent (2/6); base truncate; simple (1), or with central peg (21); attached transversely. GLUMES Glumes reaching apex of florets (1), or exceeding apex of florets (21); firmer than fertile lemma. Lower glume oblong (10), or ovate (11), or obovate (1); not gibbous (21), or gibbous (1); coriaceous (19), or indurate (3); without keels (1), or 2-keeled (21); wingless (2), or winged on keel (20); 3-4 -veined (1/5), or 5 -veined (3/5), or 7 -veined (2/5). Lower glume lateral veins obscure (1), or distinct (21); without ribs (21), or ribbed (1). Lower glume surface convex (19), or flat (2), or concave (1); smooth (14), or with hooked spines (1), or muricate (2), or rugose (1), or cancellate (2), or areolate (5); glabrous (20), or pubescent (4). Lower glume apex emarginate (7/17), or truncate (1/17), or obtuse (5/17), or acute (4/17), or caudate (1/17). Upper glume lanceolate (1), or oblong (19), or ovate (2); membranous (11), or chartaceous (10), or cartilaginous (1); 1-keeled; wingless (17), or winged on keel (5); 1 -veined (3/12), or 3 -veined (9/12). Upper glume primary vein eciliate (21), or ciliate (1). Upper glume surface glabrous (21), or puberulous (1); without hair tufts (21), or with a dorsal tuft of hair (1). Upper glume apex acute (6/6). FLORETS Basal sterile florets barren; with palea (19), or without significant palea (3). Lemma of lower sterile floret lanceolate (1), or oblong (18), or ovate (3); hyaline; 0 -veined (3/7), or 2 -veined (3/7), or 3 -veined (1/7); obtuse (6/6). Fertile lemma lanceolate (1), or elliptic (17), or oblong (1), or ovate (3); hyaline; without keel; 0 -veined (10/14), or 1 -veined (7/14), or 3 -veined (3/14). Lemma apex obtuse (6/6). Palea 0.8-0.9-1 length of lemma; hyaline (6), or membranous (16). FLOWER Anthers 3 (9/9). Stigmas 2 (1/1). DISTRIBUTION Africa (3), or Temperate Asia (2), or Tropical Asia (9), or Australasia (1), or North America (6), or South America (7).

Distribution Map

 
  • Native distribution
Found in
  • Africa East Tropical Africa Kenya
  • Tanzania
  • Uganda
  • Northeast Tropical Africa Chad
  • Ethiopia
  • South Tropical Africa Angola
  • Malawi
  • Mozambique
  • Zambia
  • Zimbabwe
  • Southern Africa Cape Provinces
  • KwaZulu-Natal
  • West Tropical Africa Benin
  • Burkina
  • Guinea
  • Guinea-Bissau
  • Ivory Coast
  • Mali
  • Nigeria
  • Senegal
  • Sierra Leone
  • Togo
  • West-Central Tropical Africa Burundi
  • Cameroon
  • Central African Republic
  • Gabon
  • Asia-Temperate China China South-Central
  • Asia-Tropical Indian Subcontinent Assam
  • Bangladesh
  • East Himalaya
  • India
  • Nepal
  • Indo-China Andaman Is.
  • Cambodia
  • Myanmar
  • Nicobar Is.
  • Thailand
  • Vietnam
  • Malesia Borneo
  • Jawa
  • Lesser Sunda Is.
  • Malaya
  • Maluku
  • Philippines
  • Sulawesi
  • Sumatera
  • Papuasia New Guinea
  • Australasia Australia Northern Territory
  • Queensland
  • Western Australia
  • Northern America Mexico Mexico Gulf
  • Mexico Southeast
  • North-Central U.S.A. Kansas
  • Missouri
  • Oklahoma
  • Northeastern U.S.A. New Jersey
  • South-Central U.S.A. Texas
  • Southeastern U.S.A. Alabama
  • Arkansas
  • Delaware
  • Florida
  • Georgia
  • Louisiana
  • Maryland
  • Mississippi
  • North Carolina
  • South Carolina
  • Virginia
  • Southern America Brazil Brazil North
  • Brazil South
  • Brazil Southeast
  • Brazil West-Central
  • Caribbean Cuba
  • Trinidad-Tobago
  • Central America Costa Rica
  • Guatemala
  • Honduras
  • Panamá
  • Northern South America French Guiana
  • Guyana
  • Suriname
  • Venezuela
  • Southern South America Argentina Northeast
  • Paraguay
  • Uruguay
  • Western South America Bolivia
  • Colombia

  Bibliography

  • 1 Forzza, R.C. & al. (2013). Lista de Espécies da Flora do Brasil. http://reflora.jbrj.gov.br/jabot/listaBrasil/ConsultaPublicaUC/ConsultaPublicaUC.do.
  • 2 Veldkamp, J.F. & al. (2013). A revision of Mnesithea (Gramineae - Rottboelliinae) in Malesia and Thailand. Blumea 58: 277-292.
  • 3 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.