1. Family: Poaceae Barnhart
    1. Genus: Poa L.
      1. Poa confinis Vasey

        This species is accepted, and its native range is W. Canada to NW. California.

    [GB]
    Habit
    Perennial; caespitose. Rhizomes elongated. Culms geniculately ascending; 10-25 cm long. Culm-internodes terete. Leaf-sheaths with 0.33-0.5 of their length closed. Ligule an eciliate membrane; 0.8-2 mm long; entire; acute. Leaf-blades involute; 1-2 mm wide; firm.
    Inflorescences
    Dioecious. Inflorescence a panicle. Panicle contracted; lanceolate, or oblong; 1.5-3.5 cm long. Primary panicle branches appressed. Spikelets solitary. Fertile spikelets pedicelled. Male inflorescence similar to female. Male spikelets similar to female but less developed.
    Spikelets
    Spikelets comprising 3-4 fertile florets; with diminished florets at the apex. Spikelets ovate; laterally compressed; 4-5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes smooth. Floret callus woolly.
    Fertile
    Spikelets comprising 3-4 fertile florets; with diminished florets at the apex. Spikelets ovate; laterally compressed; 4-5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes smooth. Floret callus woolly.
    Glume
    Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 2.5-3 mm long; 0.75-0.8 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein smooth, or scaberulous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; membranous; 1-keeled; 3 -veined. Upper glume primary vein smooth, or scaberulous. Upper glume apex acute.
    Florets
    Fertile florets female. Fertile lemma ovate; oblong in profile; 3 mm long; membranous; keeled; 5 -veined. Lemma lateral veins obscure. Lemma surface smooth, or asperulous. Lemma apex acute. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2; 1 mm long; membranous; irregularly toothed. Anthers 3; 1.5 mm long.
    Fruits
    Caryopsis with adherent pericarp. Hilum punctiform.
    Male
    Male inflorescence similar to female. Male spikelets similar to female but less developed.
    Distribution
    North America: eastern Canada, northwest USA, and southwest USA.
    Reference
    Poeae. Pl Pac NW 1996.

    Distribution

    Native to:

    British Columbia, California, Oregon, Washington

    Poa confinis Vasey appears in other Kew resources:

    First published in Bull. Div. Bot. U.S.D.A. 13(2): t. 75 (1893)

    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