1. Family: Poaceae Barnhart
    1. Genus: Anthoxanthum L.
      1. Anthoxanthum occidentale (Buckley) Veldkamp

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

    [GB]
    Habit
    Perennial; caespitose. Rhizomes elongated. Culms 60-90 cm long. Leaf-sheaths scaberulous. Ligule an eciliate membrane; 3-6 mm long; pubescent on abaxial surface; erose; obtuse, or acute. Leaf-blades 20-40 cm long; 7-12 mm wide; aromatic. Leaf-blade venation prominent; with distinct cross veins. Leaf-blade margins scabrous.
    Inflorescences
    Inflorescence a panicle. Panicle open; ovate; 8-13 cm long; bearing few spikelets. Primary panicle branches drooping. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 5 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Fertile
    Spikelets comprising 2 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 5 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Glume
    Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma; shiny. Lower glume ovate; 4 mm long; 1 length of upper glume; membranous; 1-keeled; 3 -veined. Lower glume apex acute. Upper glume ovate; 4 mm long; membranous; 1-keeled; 3 -veined. Upper glume apex acute.
    Florets
    Basal sterile florets similar; male; with palea; attached to and deciduous with the fertile. Lemma of lower sterile floret elliptic; 4.5 mm long; 0.9 length of fertile lemma; chartaceous; 1-keeled; 5 -veined; puberulous; ciliate on margins; dentate; 2 -fid; obtuse; muticous, or mucronate. Lemma of upper sterile floret oblong; 1 length of lower sterile floret; chartaceous; pubescent; ciliate on margins; lobed; 2 -fid; obtuse; muticous, or mucronate. Fertile lemma ovate; 4.5 mm long; cartilaginous; shiny; without keel. Lemma surface puberulous; hairy above. Lemma margins convolute; covering most of palea. Lemma apex acute. Palea elliptic; 1 -veined; without keels.
    Flowers
    Anthers 2 (bisexual), or 3 (male); 2.5 mm long. Ovary glabrous.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    North America: northwest USA and southwest .
    Reference
    Aveneae. Fl Pac SW 1994.

    Images

    Distribution

    Native to:

    California, Oregon, Washington

    Anthoxanthum occidentale (Buckley) Veldkamp appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Nuttall, T. [s.n.], Oregon Hierochloe occidentalis K000838031 isotype
    Nuttall, T. [s.n.], Oregon Hierochloe occidentalis K000838032

    First published in Blumea 30: 348 (1985)

    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 Hierochloe occidentalis.]

    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 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