1. Family: Poaceae Barnhart
    1. Genus: Festuca Tourn. ex L.
      1. Festuca orizabensis E.B.Alexeev

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

    [GB]
    Habit
    Perennial; caespitose; clumped loosely. Rhizomes absent, or short. Basal innovations extravaginal and intravaginal. Culms 100-150 cm long. Leaf-sheaths open for most of their length; glabrous on surface. Ligule a ciliolate membrane; 0.3-0.5 mm long; truncate. Leaf-blades flat, or convolute; 2-4 mm wide. Leaf-blade venation with 11-21 secondary veins; 7-19 inner ridges.
    Inflorescences
    Inflorescence a panicle. Panicle open; ovate; 15-30 cm long. Panicle branches scabrous. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 5-6 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 10-13 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes eventually visible between lemmas.
    Fertile
    Spikelets comprising 5-6 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 10-13 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes eventually visible between lemmas.
    Glume
    Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 0.75 length of upper glume; chartaceous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 0.7-0.8 length of adjacent fertile lemma; chartaceous; without keels; 3 -veined. Upper glume apex acute.
    Florets
    Fertile lemma lanceolate; 6-7 mm long; chartaceous; without keel; 5 -veined. Lemma surface granulose; rough above. Lemma apex acute; muticous. Palea 2 -veined. Palea keels scaberulous; adorned below; with 0.33-0.5 of their length adorned. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Anthers 3; 3-3.5 mm long. Ovary pubescent on apex.
    Fruits
    Caryopsis with adherent pericarp. Hilum linear.
    Distribution
    North America: Mexico.
    Reference
    Poeae. Alexeev 1995.

    Distribution

    Native to:

    Mexico Central, Mexico Gulf

    Festuca orizabensis E.B.Alexeev appears in other Kew resources:

    First published in Bot. Zhurn. (Moscow & Leningrad) 66: 1497 (1981)

    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.
    • 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
    • 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 2019. 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 2019. 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