1. Family: Poaceae Barnhart
    1. Genus: Sorghastrum Nash
      1. Sorghastrum nutans (L.) Nash

        This species is accepted, and its native range is N. & Central America.

    [GB]
    Habit
    Perennial. Rhizomes elongated; scaly. Culms erect; 50-230 cm long; 1.5-4.5 mm diam. Leaf-sheaths 10-40 cm long; glabrous on surface, or pilose. Leaf-sheath auricles erect. Ligule an eciliate membrane; 2-5 mm long. Leaf-blades 10-50 cm long; 1-4 mm wide. Leaf-blade surface glabrous, or pubescent. Leaf-blade margins scabrous. Leaf-blade apex attenuate.
    Inflorescences
    Inflorescence a panicle with branches tipped by a raceme. Peduncle 20-60 cm long. Panicle open; oblong; dense; 10-35 cm long. Panicle axis villous. Racemes bearing a triad of spikelets, or few fertile spikelets; 1-3 fertile spikelets on each. Rhachis fragile at the nodes. Rhachis internodes filiform. Spikelets in pairs, or in threes. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster, or 2 in the cluster. Pedicels filiform; 3-6 mm long; pubescent.
    Spikelets
    Companion sterile spikelets represented by barren pedicels. Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 5-8 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus bearded; base obtuse.
    Sterile
    Companion sterile spikelets represented by barren pedicels.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 5-8 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus bearded; base obtuse.
    Glume
    Glumes dissimilar; firmer than fertile lemma. Lower glume oblong; 1 length of spikelet; coriaceous; light brown; without keels; 7-9 -veined. Lower glume surface pubescent. Lower glume apex truncate. Upper glume oblong; 1 length of spikelet; coriaceous; light brown; without keels; 5 -veined. Upper glume surface glabrous. Upper glume apex acute.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret oblong; 4-6 mm long; hyaline; 2 -veined; ciliate on margins; dentate; 2 -fid. Fertile lemma oblong; 3-5.5 mm long; hyaline; without keel; 3 -veined. Lemma margins ciliolate. Lemma apex lobed; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 10-22 mm long overall; with twisted column. Column of lemma awn hispidulous. Palea absent or minute.
    Flowers
    Lodicules 2; glabrous. Anthers 3; 3-5 mm long.
    Fruits
    Caryopsis 2.3 mm long.
    Distribution
    Australasia: Australia. North America: eastern Canada, northwest USA, north-central USA, northeast USA, southwest USA, south-central USA, southeast USA, and Mexico. South America: Brazil.
    Reference
    Andropogoneae. Davila 1993.

    Distribution

    Native to:

    Alabama, Arizona, Arkansas, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Honduras, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Manitoba, Maryland, Masachusettes, Mexican Pacific Is., Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Southeast, Mexico Southwest, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Ontario, Pennsylvania, Québec, Rhode I., Saskatchewan, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, West Virginia, Wisconsin, Wyoming

    Sorghastrum nutans (L.) Nash appears in other Kew resources:

    First published in J.K.Small, Fl. S.E. U.S.: 66 (1903)

    Accepted by

    • Nelson Sutherland, C.H. (2008). Catálogo de las plantes vasculares de Honduras. Espermatofitas: 1-1576. SERNA/Guaymuras, Tegucigalpa, Honduras.
    • 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.
    • Flora of North America Editorial Committee (2003). Flora of North America North of Mexico 25: 1-781. Oxford University Press, New York, Oxford.
    • Levin, G.A. & Moran, R. (1989). The vascular flora of isla Socorro, Mexico: 1-71. Dept. of Botany, San Diego Natural History Museum, San Diego.

    Literature

    Kew Backbone Distributions
    • Nelson Sutherland, C.H. (2008). Catálogo de las plantes vasculares de Honduras. Espermatofitas: 1-1576. SERNA/Guaymuras, Tegucigalpa, Honduras.
    • 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.
    • Flora of North America Editorial Committee (2003). Flora of North America North of Mexico 25: 1-781. Oxford University Press, New York, Oxford.
    • Levin, G.A. & Moran, R. (1989). The vascular flora of isla Socorro, Mexico: 1-71. Dept. of Botany, San Diego Natural History Museum, San Diego.

    Sources

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