Calamovilfa (A.Gray) Hack. ex Scribn. & Southw.
  • True Grasses: 113 (1890) 

Notes: Distribution: N. America

General Description

HABIT Perennial. Rhizomes short (3), or elongated (2). Culms 75-145.5-230 cm long. Lateral branches lacking (1/1). Ligule a ciliate membrane (1), or a fringe of hairs (4). Leaf-blades persistent, or deciduous at the ligule (2). Leaf-blade margins cartilaginous (1/1). INFLORESCENCE Inflorescence a panicle. Panicle open (4), or contracted (2). Spikelets solitary, or in pairs (1). Fertile spikelets pedicelled. FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 3.7-6.3-10 mm long; breaking up at maturity; disarticulating below each fertile floret. Spikelet callus bearded (1/1). Floret callus bearded (4/4). GLUMES Glumes persistent; shorter than spikelet (2), or reaching apex of florets (2), or exceeding apex of florets (2). Lower glume ovate; 0.5-0.751-0.9 length of upper glume; membranous; 1-keeled (4/4); 1 -veined. Lower glume lateral veins absent. Lower glume apex acute (3), or acuminate (2). Upper glume ovate; 0.75-0.96-1.2 length of adjacent fertile lemma; membranous; 1-keeled (4/4); 1 -veined. Upper glume apex acute (3), or acuminate (2), or attenuate (1). FLORETS Fertile lemma lanceolate (1), or obovate (4); membranous; keeled (4/4); 1 -veined. Lemma midvein eciliate (4), or pubescent (1). Lemma surface glabrous (2), or pubescent (3). Lemma apex acute (4), or attenuate (1). Palea 1.1 length of lemma; 2 -veined. Palea keels separated (1), or distant but flanking a median depression (4); eciliate (2), or pubescent (3). Palea surface glabrous (4), or pubescent (1). Palea apex dentate (1/1). FLOWER Anthers 3 (4/4). FRUIT Caryopsis with free soft pericarp. DISTRIBUTION North America.

Distribution Map

  • Native distribution
Found in
  • Northern America Eastern Canada Ontario
  • North-Central U.S.A. Illinois
  • Iowa
  • Kansas
  • Minnesota
  • Missouri
  • Nebraska
  • North Dakota
  • Oklahoma
  • South Dakota
  • Wisconsin
  • Northeastern U.S.A. Indiana
  • Michigan
  • New Jersey
  • New York
  • Ohio
  • Pennsylvania
  • Northwestern U.S.A. Colorado
  • Idaho
  • Montana
  • Washington
  • Wyoming
  • South-Central U.S.A. New Mexico
  • Texas
  • Southeastern U.S.A. Alabama
  • Arkansas
  • Florida
  • North Carolina
  • South Carolina
  • Tennessee
  • Virginia
  • Southwestern U.S.A. Arizona
  • Utah
  • Western Canada Alberta
  • British Columbia
  • Manitoba
  • Saskatchewan


  • 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
Clayton, W.D., Vorontsova, M.S., Harman, K.T. and Williamson, H. (2006 onwards). GrassBase - The Online World Grass Flora. [accessed 24 January 2012; 14:30 GMT]
  • A © Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
eMonocot. (2010, 1st November). Retrieved Wednesday, 8th February, 2012, from
  • B Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
  • C All Rights Reserved
World Checklist of Selected Plant Families
WCSP 2014. 'World Checklist of Selected Plant Families. Facilitated by the Royal Botanic Gardens, Kew. Published on the Internet; Retrieved 2011 onwards
  • D See 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.