1. Family: Poaceae Barnhart
    1. Genus: Poa L.
      1. Poa bigelovii Vasey ex Scribn.

        This species is accepted, and its native range is Colorado to Mexico.

    [GB]
    Habit
    Annual; caespitose; clumped loosely. Butt sheaths herbaceous. Culms erect; 10-60 cm long. Culm-internodes terete. Leaves cauline. Leaf-sheaths with 0.25-0.5 of their length closed; keeled. Ligule an eciliate membrane; 1-6 mm long; glabrous on abaxial surface, or scaberulous on abaxial surface; acute. Leaf-blades flat, or conduplicate; 1.5-5 mm wide. Leaf-blade midrib keeled beneath. Leaf-blade surface glabrous. Leaf-blade apex abruptly acute; hooded.
    Inflorescences
    Inflorescence a panicle. Panicle contracted; lanceolate; continuous, or interrupted; 2-15 cm long; 0.5-1.5 cm wide. Primary panicle branches appressed; 2 -nate; naked below, or bearing spikelets almost to the base. Panicle branches scabrous. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 4-5 fertile florets; with diminished florets at the apex. Spikelets ovate; laterally compressed; 4-7 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes obscured by lemmas; smooth. Floret callus woolly.
    Fertile
    Spikelets comprising 4-5 fertile florets; with diminished florets at the apex. Spikelets ovate; laterally compressed; 4-7 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes obscured by lemmas; smooth. Floret callus woolly.
    Glume
    Glumes persistent; similar; shorter than spikelet; incurved at apex. Lower glume lanceolate; 0.9 length of upper glume; membranous; much thinner on margins; 1-keeled; 1-3 -veined. Lower glume lateral veins absent, or obscure. Lower glume apex acute. Upper glume lanceolate; membranous; with hyaline margins; 1-keeled; 3 -veined. Upper glume apex acute.
    Florets
    Fertile lemma ovate; oblong in profile; 3-5 mm long; membranous; much thinner on margins; keeled; 5 -veined. Lemma midvein ciliate. Lemma lateral veins with distinct primaries but obscure intermediates. Lemma surface smooth, or papillose; glabrous, or puberulous; hairy below. Lemma margins ciliate. Lemma apex obtuse, or acute. Palea 0.9 length of lemma. Palea keels ciliate. Palea surface papillose. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2; membranous. Anthers 3; 0.2-1 mm long.
    Fruits
    Caryopsis with adherent pericarp. Hilum punctiform.
    Distribution
    North America: northwest USA, north-central USA, southwest USA, south-central USA, and Mexico.
    Reference
    Poeae. Soreng 1992.

    Distribution

    Native to:

    Arizona, California, Colorado, Mexico Northeast, Mexico Northwest, Mexico Southwest, Nevada, New Mexico, Oklahoma, Texas, Utah

    Introduced into:

    Austria

    Poa bigelovii Vasey ex Scribn. appears in other Kew resources:

    First published in Bull. Torrey Bot. Club 10: 31 (1883)

    Accepted by

    • Engelmaier, P. & Wilhalm, T. (2018). Alien grasses (Poaceae) in the flora of the Eastern Alps Neilreichia 9: 177-245.
    • Soreng, R.J. & Peterson, P.M. (2012). Revision of Poa L. (Poaceae, Pooideae, Poeae, Poinae) in Mexico: new records, re-evaluation of P. ruprechtii, and two new species, P. palmeri and P. wendtii PhytoKeys 15: 1-104.
    • Garcia-Mendoza, A.J. & Meave, J.A. (eds.) (2012). Diversidad florística de Oaxaca: de musgos a angiospermas (colecciones y listas de especies), ed. 2: 1-351. Instituto de Biología, Universidad Nacional Autónoma de México.
    • 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.
    • Dávila, P., Mejia-Saulés, M.T., Gómez-Sánchez, N., Valdés-Reyna, J., Ortíz, J.J., Morín, C., Castrejón, J. & Ocampo, A. (2006). Catálogo de las Gramíneas de México: 1-671. CONABIO, México city.

    Literature

    Kew Backbone Distributions
    • Engelmaier, P. & Wilhalm, T. (2018). Alien grasses (Poaceae) in the flora of the Eastern Alps Neilreichia 9: 177-245.
    • Garcia-Mendoza, A.J. & Meave, J.A. (eds.) (2012). Diversidad florística de Oaxaca: de musgos a angiospermas (colecciones y listas de especies), ed. 2: 1-351. Instituto de Biología, Universidad Nacional Autónoma de México.
    • Flora of North America Editorial Committee (2007). Flora of North America North of Mexico 24: 1-908. Oxford University Press, New York, Oxford.
    • Dávila, P., Mejia-Saulés, M.T., Gómez-Sánchez, N., Valdés-Reyna, J., Ortíz, J.J., Morín, C., Castrejón, J. & Ocampo, A. (2006). Catálogo de las Gramíneas de México: 1-671. CONABIO, México city.

    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