1. Family: Poaceae Barnhart
    1. Genus: Sphenopholis Scribn.
      1. Sphenopholis obtusata (Michx.) Scribn.

        This species is accepted, and its native range is Hawaiian Islands, Canada to Mexico, Hispaniola.

    [GB]
    Habit
    Annual, or perennial; caespitose. Culms 20-70(-120) cm long. Ligule an eciliate membrane; 1.5-3 mm long. Leaf-blades 4-10(-15) cm long (basal blades); 2-8 mm wide.
    Inflorescences
    Inflorescence a panicle. Panicle open, or contracted; lanceolate; 5-25 cm long. Primary panicle branches appressed. Spikelets solitary. Fertile spikelets pedicelled. Pedicels linear; 0.2-2 mm long.
    Spikelets
    Spikelets comprising 2-3 fertile florets; with a barren rhachilla extension. Spikelets obovate; laterally compressed; 1.5-5 mm long; falling entire. Rhachilla internodes 0.3-1.2 mm long; smooth, or scaberulous.
    Fertile
    Spikelets comprising 2-3 fertile florets; with a barren rhachilla extension. Spikelets obovate; laterally compressed; 1.5-5 mm long; falling entire. Rhachilla internodes 0.3-1.2 mm long; smooth, or scaberulous.
    Glume
    Glumes dissimilar; with lower narrower than upper; shorter than spikelet; gaping. Lower glume lanceolate; 1-4 mm long; 0.9 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein smooth, or scaberulous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume obovate; 1.2-4.2 mm long; 0.8 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume primary vein scaberulous. Upper glume surface smooth, or asperulous; rough on veins. Upper glume apex obtuse, or acute.
    Florets
    Fertile lemma ovate; 1.4-4.4 mm long; membranous; keeled; 5 -veined. Lemma surface smooth, or scaberulous. Lemma apex obtuse, or acute. Palea gaping; 0.8 length of lemma. Palea keels scaberulous. Rhachilla extension 0.75 length of fertile floret.
    Flowers
    Ovary glabrous.
    Fruits
    Caryopsis with adherent pericarp; oblong; glabrous. Endosperm liquid.
    Distribution
    Pacific: north-central. North America: western Canada, northwest USA, north-central USA, northeast USA, southwest USA, south-central USA, southeast USA, and Mexico. South America: Caribbean.
    Reference
    Aveneae. Erdman.
    Diagnostic
    Lower glume less than 0.33 width of upper.

    Images

    Distribution

    Native to:

    Alabama, Alberta, Arizona, Arkansas, British Columbia, California, Colorado, Connecticut, Delaware, District of Columbia, Dominican Republic, Florida, Georgia, Haiti, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Manitoba, Maryland, Masachusettes, Mexico Central, Mexico Northeast, Mexico Northwest, Mexico Southwest, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Brunswick, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Ontario, Oregon, Pennsylvania, Rhode I., Saskatchewan, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming

    Sphenopholis obtusata (Michx.) Scribn. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Drummond, T. [s.n.], Louisiana K000808739
    Berlandier, J.L. [1617], Texas K000808738

    First published in Rhodora 8: 144 (1906)

    Accepted by

    • Acevedo-Rodríguez, P. & Strong, M.T. (2012). Catalogue of seed plants of the West Indies Smithsonian Contributions to Botany 98: 1-1192.
    • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Dávila, P., Mejia-Saulés, M.T., Gómez-Sánchez, N., Valdés-Reyna, J., Ortíz, J.J., Morín, C., Castrejón, J. & Ocampo, A. (2006). Catálogo de las Gramíneas de México: 1-671. CONABIO, México city.

    Literature

    Kew Backbone Distributions
    • Acevedo-Rodríguez, P. & Strong, M.T. (2012). Catalogue of seed plants of the West Indies Smithsonian Contributions to Botany 98: 1-1192.
    • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.
    • Dávila, P., Mejia-Saulés, M.T., Gómez-Sánchez, N., Valdés-Reyna, J., Ortíz, J.J., Morín, C., Castrejón, J. & Ocampo, A. (2006). Catálogo de las Gramíneas de México: 1-671. CONABIO, México city.

    Sources

    GrassBase - The Online World Grass Flora
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Herbarium Catalogue Specimens
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2018. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

    Kew Names and Taxonomic Backbone
    The International Plant Names Index and World Checklist of Selected Plant Families 2018. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0