1. Family: Poaceae Barnhart
    1. Genus: Stipa L.
      1. Stipa nelsonii Scribn.

        This species is accepted, and its native range is Yukon to W. & Central U.S.A.

    [GB]
    Habit
    Perennial; caespitose. Culms 60-100 cm long. Culm-internodes distally pubescent. Leaf-sheaths pubescent. Ligule an eciliate membrane. Leaf-blades flat, or involute; 10-20 cm long; 1-5 mm wide. Leaf-blade surface pubescent.
    Inflorescences
    Inflorescence a panicle. Panicle open; linear; 10-20 cm long. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 7-15 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 7-15 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident.
    Glume
    Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; membranous; without keels. Lower glume apex acuminate. Upper glume lanceolate; hyaline; without keels. Upper glume apex acuminate.
    Florets
    Fertile lemma lanceolate; subterete; 7 mm long; coriaceous; without keel; 5 -veined. Lemma surface pubescent; with conspicuous apical hairs. Lemma margins convolute; covering most of palea. Lemma apex awned; 1 -awned. Principal lemma awn bigeniculate; 30-50 mm long overall; with twisted column. Palea 2 -veined; without keels.
    Distribution
    North America: western Canada, northwest USA, and southwest USA.
    Reference
    Stipeae. Man. U.S. Gr. 2004.

    Distribution

    Native to:

    Alberta, Arizona, British Columbia, California, Colorado, Idaho, Montana, Nevada, New Mexico, Oregon, Saskatchewan, South Dakota, Texas, Utah, Washington, Wyoming, Yukon

    Stipa nelsonii Scribn. appears in other Kew resources:

    First published in Bull. Div. Agrostol. U.S.D.A. 11: 46 (1898)

    Accepted by

    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.

    Literature

    Kew Backbone Distributions
    • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.

    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