Chasmanthium Link
  • Hort. Berol. 1: 159 (1827) 


Notes: Distribution: C. Canada, C. & E. U.S.A. to NE. Mexico

General Description

HABIT Perennial. Rhizomes short (4), or elongated (1). Culms erect (1/1), or geniculately ascending (1/1), or decumbent (1/1); slender (1/1); 30-88.5-150 cm long. Lateral branches lacking (2/2), or sparse (1/2). Ligule a ciliolate membrane (4), or a ciliate membrane (1). Leaf-blades linear (4), or lanceolate (1). Leaf-blade venation without cross veins (4), or with distinct cross veins (1). INFLORESCENCE Inflorescence a panicle (4), or composed of racemes (1). Panicle open (1/4), or contracted (3/4), or glomerate (1/4). Racemes single (1/1), or borne along a central axis (1/1); spreading (1/1); bearing few fertile spikelets (1/1); bearing 2-12 fertile spikelets on each (1/1). Spikelet packing distant (1/1). Spikelets appressed (1/2), or pendulous (1/2); solitary. Fertile spikelets sessile (3), or pedicelled (3). FERTILE SPIKELETS Spikelets comprising 0 basal sterile florets (1), or 1 basal sterile florets (4), or 2 basal sterile florets (3), or 3-4 basal sterile florets (1); 1 fertile florets (1), or 2 fertile florets (4), or 3 fertile florets (3), or 4-11 fertile florets (2), or 12-24 fertile florets (1); with diminished florets at the apex. Spikelets elliptic (1), or oblong (1), or ovate (1), or obovate (1), or cuneate (3); laterally compressed; 4-14.4-40 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose (1/1). GLUMES Glumes persistent; shorter than spikelet. Lower glume lanceolate (2), or ovate (3); 1 length of upper glume; chartaceous (1), or herbaceous (4); 1-keeled; 1-3 -veined (1/4), or 5-6 -veined (1/4), or 7 -veined (2/4), or 8 -veined (1/4), or 9 -veined (2/4), or 10-11 -veined (1/4). Lower glume lateral veins distinct (4), or prominent (1). Lower glume apex acute (4), or acuminate (1). Upper glume lanceolate (1), or ovate (4); 0.33-0.4825-0.7 length of adjacent fertile lemma; chartaceous (1), or herbaceous (4); 1-keeled; 3 -veined (1/3), or 5-7 -veined (1/3), or 9-11 -veined (1/3). Upper glume apex acute (4), or acuminate (1). FLORETS Basal sterile florets male (1), or barren (4); with palea (1), or without significant palea (4). Lemma of lower sterile floret elliptic (1), or ovate (4); chartaceous (1), or herbaceous (4); 3-5 -veined (1/3), or 7-8 -veined (1/3), or 9-11 -veined (2/3); acute. Fertile lemma lanceolate (1), or ovate (4); chartaceous (1), or herbaceous (4); keeled; 7-9 -veined (2), or 11-13 -veined (3), or 14-15 -veined (1). Lemma midvein without distinctive roughness (4), or scabrous (1); eciliate (4), or ciliolate (1). Lemma apex entire, or dentate (1); 2 -fid (1/1); acute (2), or acuminate (4). Palea embraced by lemma (3), or gaping (2); 0.8-0.9333-1 length of lemma; 2 -veined. Palea keels winged; smooth (4), or scabrous (1); eciliate (4), or ciliolate (1). Palea apex dentate (1/1). Apical sterile florets resembling fertile though underdeveloped (2), or distinct from fertile (3); 1 in number (1/1); male (1/1); linear (1/1). FLOWER Lodicules 2; fleshy. Anthers 1 (4/4). FRUIT Caryopsis with adherent pericarp; ovoid; laterally compressed (4/4). Embryo 0.5 length of caryopsis. DISTRIBUTION North America.

Distribution Map

 
  • Native distribution
Found in
  • Northern America Mexico Mexico Northeast
  • North-Central U.S.A. Illinois
  • Kansas
  • Missouri
  • Nebraska
  • Oklahoma
  • Wisconsin
  • Northeastern U.S.A. Indiana
  • Michigan
  • New Jersey
  • New York
  • Ohio
  • Pennsylvania
  • West Virginia
  • 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
  • Western Canada Manitoba

  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.