1. Family: Poaceae Barnhart
    1. Genus: Festuca Tourn. ex L.
      1. Festuca diclina Darbysh.

        This species is accepted, and its native range is Mexico (Chihuahua).

    [GB]
    Habit
    Perennial; caespitose; clumped loosely. Butt sheaths persistent and investing base of culm; with fibrous dead sheaths. Basal innovations intravaginal. Culms erect; 30-70 cm long. Culm-nodes brown, or black; glabrous. Leaf-sheaths antrorsely scabrous. Leaf-sheath auricles absent. Ligule an eciliate membrane; 0.2-0.5 mm long. Leaf-blades conduplicate, or convolute; 10-25 cm long; 1.2-1.5 mm wide. Leaf-blade venation comprising 7(-9) vascular bundles; with 5-7 inner ridges; with subepidermal sclerenchyma attached to veins below; without layer of subepidermal sclerenchyma masking vein striation. Leaf-blade surface scabrous; rough adaxially; glabrous.
    Inflorescences
    Inflorescence a panicle. Panicle open; pyramidal; 8-15 cm long. Primary panicle branches ascending; 1-2 -nate; 5-9 cm long. Panicle axis smooth. Panicle branches flexuous; smooth, or scaberulous. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 2-5 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 8-12 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pubescent; with 0.1-0.3 mm long hairs.
    Fertile
    Spikelets comprising 2-5 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 8-12 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pubescent; with 0.1-0.3 mm long hairs.
    Glume
    Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 2.4-4 mm long; 0.75 length of upper glume; chartaceous; much thinner on margins; without keels; 1 -veined. Lower glume primary vein smooth, or scaberulous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 3.5-5 mm long; 0.66 length of adjacent fertile lemma; chartaceous; with hyaline margins; without keels; 3 -veined. Upper glume primary vein smooth, or scaberulous. Upper glume apex acute.
    Florets
    Fertile lemma lanceolate; 6-8 mm long; chartaceous; without keel; 1-3(-5) -veined. Lemma lateral veins obscure. Lemma surface smooth, or scaberulous; rough above. Lemma apex setaceously attenuate; scabrous; muticous. Palea 5.5-7 mm long; 1 length of lemma; 2 -veined. Palea keels ciliolate. Palea surface pilose; hairy on back; hairy above. Palea apex dentate; 2 -fid. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 2. Anthers 3; 3-4.2 mm long. Ovary pubescent on apex.
    Fruits
    Caryopsis with adherent pericarp. Hilum linear.
    Distribution
    North America: Mexico.
    Reference
    Poeae. Darbyshire 2004.

    Distribution

    Native to:

    Mexico Northeast

    Festuca diclina Darbysh. appears in other Kew resources:

    First published in Novon 5: 129 (1995)

    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.

    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