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  1. Family: Poaceae Barnhart
    1. Genus: Eriocoma Nutt.
      1. Eriocoma webberi Thurb.

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

    [GB]
    Habit
    Perennial; caespitose; clumped densely. Culms erect; 10-30 cm long. Culm-internodes solid. Leaves mostly basal. Ligule an eciliate membrane; 0.3-0.5 mm long; glabrous on abaxial surface. Leaf-blades elliptic; involute; 5-10 cm long; 0.5 mm wide. Leaf-blade surface scabrous.
    Inflorescences
    Inflorescence a panicle. Panicle open; linear; 4-7 cm long. Primary panicle branches appressed. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets oblong; subterete; 7-9 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus 0.3 mm long; bearded; acute.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets oblong; subterete; 7-9 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus 0.3 mm long; bearded; acute.
    Glume
    Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 7-9 mm long; 1 length of upper glume; membranous; without keels; 5 -veined. Lower glume lateral veins obscure. Lower glume surface asperulous. Lower glume apex acuminate. Upper glume lanceolate; 7-9 mm long; 1.2 length of adjacent fertile lemma; membranous; without keels; 5 -veined. Upper glume lateral veins obscure. Upper glume surface asperulous. Upper glume apex acuminate.
    Florets
    Fertile lemma lanceolate; subterete; 6-7 mm long; coriaceous; without keel. Lemma surface pilose. Lemma margins convolute; covering most of palea. Lemma apex dentate; 2 -fid; with lobes 0.5-1 mm long; awned; 1 -awned. Principal lemma awn from a sinus; straight, or curved; 5-8 mm long overall; deciduous. Palea coriaceous; 2 -veined; without keels.
    Flowers
    Lodicules 3; 1.5 mm long. Anthers 1.5 mm long.
    Distribution
    North America: northwest USA and southwest .
    Reference
    Stipeae. Fl Pac NW 1994.

    Distribution

    Native to:

    California, Colorado, Idaho, Nevada, Oregon, South Dakota, Utah

    Synonyms

    Other Data

    Eriocoma webberi Thurb. appears in other Kew resources:

    Bibliography

    First published in S.Watson & al., Bot. California 2: 283 (1880)

    Not 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. [Cited as Oryzopsis webberi.]

    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 2020. 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 2020. 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