1. Family: Poaceae Barnhart
    1. Genus: Festuca Tourn. ex L.
      1. Festuca roblensis Gonz.-Led.

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

    [GB]
    Habit
    Perennial; caespitose; clumped densely. Butt sheaths persistent and investing base of culm; with fibrous dead sheaths. Basal innovations intravaginal. Culms erect; 100-130 cm long; 1.6-2.6 mm diam. Leaf-sheaths smooth, or scaberulous. Leaf-sheath auricles absent. Ligule an eciliate membrane; 1.3-5 mm long; lacerate. Leaf-blades flat, or involute; 30-55 cm long; 1.5-3.6 mm wide. Leaf-blade midrib conspicuous. Leaf-blade surface ribbed; grooved adaxially; smooth, or scaberulous; rough abaxially. Leaf-blade apex attenuate.
    Inflorescences
    Inflorescence a panicle. Peduncle smooth, or scaberulous above. Panicle open; ovate; 16-26 cm long. Primary panicle branches 2 -nate; bearing 2-7 fertile spikelets on each lower branch. Panicle branches scaberulous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 3-8 mm long.
    Spikelets
    Spikelets comprising 3-6 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 13-20 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes scaberulous.
    Fertile
    Spikelets comprising 3-6 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 13-20 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes scaberulous.
    Glume
    Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 2.5-4.8 mm long; 0.33-0.5 length of upper glume; chartaceous; much thinner on margins; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 3.8-6 mm long; 0.33-0.5 length of adjacent fertile lemma; chartaceous; with hyaline margins; without keels; 3 -veined. Upper glume apex acute.
    Florets
    Fertile lemma lanceolate; 9.7-12.7 mm long; chartaceous; without keel; 5 -veined. Lemma surface smooth, or scaberulous; rough above. Lemma apex acute; awned; 1 -awned. Principal lemma awn 0.5-3.7 mm long overall. Palea 2 -veined. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2; 1-1.5 mm long. Anthers 3; 4-5.5 mm long. Ovary glabrous.
    Fruits
    Caryopsis with adherent pericarp; 5.5-7 mm long. Hilum linear.
    Distribution
    North America: Mexico.
    Reference
    Poeae. Gonz.-Ledesma 2004.

    Distribution

    Native to:

    Mexico Northeast

    Festuca roblensis Gonz.-Led. appears in other Kew resources:

    First published in Novon 8: 147 (1998)

    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