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

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

    [GB]
    Habit
    Perennial; caespitose; clumped densely. Butt sheaths persistent and investing base of culm; with fibrous dead sheaths. Basal innovations intravaginal. Culms erect; 25-50 cm long. Culm-internodes smooth. Lateral branches lacking. Leaf-sheaths open for most of their length; with 0.33 of their length closed; smooth. Ligule an eciliate membrane; 0.1 mm long. Leaf-blades filiform; conduplicate; angular in section; 0.35-0.45 mm wide. Leaf-blade venation comprising 5 vascular bundles; with 3 inner ridges; with 5-7 subepidermal sclerenchyma strands; with subepidermal sclerenchyma free from veins; without layer of subepidermal sclerenchyma masking vein striation. Leaf-blade apex acute.
    Inflorescences
    Inflorescence a panicle. Panicle open; lanceolate, or oblong; 6-10 cm long. Panicle branches terete; smooth. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 5-7 fertile florets; with diminished florets at the apex. Spikelets ovate; laterally compressed; 8.5-10 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Fertile
    Spikelets comprising 5-7 fertile florets; with diminished florets at the apex. Spikelets ovate; laterally compressed; 8.5-10 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Glume
    Glumes persistent; dissimilar; shorter than spikelet. Lower glume lanceolate; chartaceous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate, or ovate; chartaceous; without keels; 3 -veined. Upper glume apex acute.
    Florets
    Fertile lemma lanceolate; 5-5.5 mm long; chartaceous; without keel; 5 -veined. Lemma surface smooth. Lemma apex acute; muticous. Palea 2 -veined. Palea keels smooth. Apical sterile florets distinct from fertile; with internodes 3-3.5 mm long between them.
    Flowers
    Lodicules 2. Anthers 3. Ovary glabrous.
    Fruits
    Caryopsis with adherent pericarp. Hilum linear.
    Distribution
    North America: Mexico.
    Reference
    Poeae. Alexeev 2001.

    Distribution

    Native to:

    Mexico Central

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

    First published in Bot. Zhurn. (Moscow & Leningrad) 66: 1500 (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