1. Family: Poaceae Barnhart
    1. Genus: Poa L.
      1. Poa atropurpurea Scribn.

        This species is accepted, and its native range is S. California.

    [GB]
    Habit
    Perennial; caespitose; clumped loosely. Rhizomes elongated. Butt sheaths herbaceous. Culms erect; 30-40 cm long; with 0.4 of their length below uppermost node. Culm-internodes terete. Leaves basal and cauline. Ligule an eciliate membrane. Leaf-blades straight; conduplicate, or involute; 1-2 mm wide.
    Inflorescences
    Inflorescence a panicle. Panicle spiciform; oblong; 3-5 cm long. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 3-4 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 3-4 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus glabrous.
    Fertile
    Spikelets comprising 3-4 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 3-4 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus glabrous.
    Glume
    Glumes persistent; similar; shorter than spikelet. Lower glume oblong; 1.5-2 mm long; 0.75 length of upper glume; membranous; purple; 1-keeled. Lower glume apex acute. Upper glume lanceolate; 1.5-2 mm long; 0.75 length of adjacent fertile lemma; membranous; purple; 1-keeled; 3 -veined. Upper glume apex acute.
    Florets
    Fertile lemma ovate; 2.5 mm long; membranous; purple; keeled; 5 -veined. Lemma lateral veins obscure. Lemma surface glabrous. Lemma apex acute. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2; membranous. Anthers 3.
    Fruits
    Caryopsis with adherent pericarp. Hilum punctiform.
    Distribution
    North America: southwest USA.
    Reference
    Poeae. Man US Gr 1997.

    Distribution

    Native to:

    California

    Poa atropurpurea Scribn. appears in other Kew resources:

    First published in Bull. Div. Agrostol. U.S.D.A. 11: 53 (1898)

    Accepted by

    • 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.

    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