1. Family: Poaceae Barnhart
    1. Genus: Festuca Tourn. ex L.
      1. Festuca uninodis Hack. ex Stuck.

        This species is accepted, and its native range is NW. Argentina.

    [GB]
    Habit
    Perennial; caespitose. Butt sheaths grey. Basal innovations intravaginal. Culms erect; 35-40 cm long; 1 -noded. Culm-internodes terete; antrorsely scabrous. Leaf-sheaths inflated; open for most of their length; antrorsely scabrous; glabrous on surface. Leaf-sheath auricles erect. Ligule a ciliolate membrane; 1 mm long; truncate. Leaf-blades erect; filiform; convolute; 15-20 cm long; 0.6-0.7 mm wide; stiff. Leaf-blade venation comprising 11 vascular bundles; with 5 inner ridges; with 16 subepidermal sclerenchyma strands; with subepidermal sclerenchyma attached to veins above and below; without layer of subepidermal sclerenchyma masking vein striation. Leaf-blade surface scabrous. Leaf-blade apex pungent.
    Inflorescences
    Inflorescence a panicle. Panicle open; linear, or oblong; dense; 8-10 cm long. Primary panicle branches appressed; 2 -nate. Panicle axis scabrous. Panicle branches scabrous. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 3-4 fertile florets; with diminished florets at the apex. Spikelets lanceolate, or elliptic; laterally compressed; 9-10 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 9-10 mm long; scaberulous.
    Fertile
    Spikelets comprising 3-4 fertile florets; with diminished florets at the apex. Spikelets lanceolate, or elliptic; laterally compressed; 9-10 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 9-10 mm long; scaberulous.
    Glume
    Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 3.5 mm long; 0.75 length of upper glume; chartaceous; without keels; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 5 mm long; 0.7-0.8 length of adjacent fertile lemma; chartaceous; without keels; 3 -veined. Upper glume primary vein scabrous. Upper glume apex acute.
    Florets
    Fertile lemma linear, or lanceolate; 6.5-7.5 mm long; chartaceous; without keel; 5 -veined. Lemma midvein scabrous. Lemma apex acute; awned; 1 -awned. Principal lemma awn 1-1.5 mm long overall; deciduous. Palea 1 length of lemma; 2 -veined. Palea keels ciliolate. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Anthers 3; 2.5 mm long. Ovary glabrous.
    Fruits
    Caryopsis with adherent pericarp; sulcate on hilar side; glabrous. Hilum linear; 0.75 length of caryopsis.
    Distribution
    South America: southern South America.
    Reference
    Poeae. Turpe 1997.
    [GB]
    Habit
    Perennial; caespitose; clumped densely. Basal innovations intravaginal. Culms erect; 20 cm long; 2 -noded. Culm-internodes terete; scaberulous. Leaf-sheaths open for most of their length; smooth; glabrous on surface. Ligule a ciliolate membrane; truncate. Leaf-blades filiform; conduplicate; 0.6-0.7 mm wide; stiff. Leaf-blade venation comprising 7 vascular bundles; with 5 inner ridges; with 15 subepidermal sclerenchyma strands; with subepidermal sclerenchyma attached to veins below; without layer of subepidermal sclerenchyma masking vein striation. Leaf-blade surface scabrous; rough on both sides. Leaf-blade apex acute; pungent.
    Inflorescences
    Inflorescence a panicle. Panicle open; linear, or oblong; dense; 6-8 cm long. Primary panicle branches appressed; 2 -nate. Panicle axis scabrous. Panicle branches scabrous. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 4-5 fertile florets; with diminished florets at the apex. Spikelets lanceolate, or elliptic; laterally compressed; 8-9 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 1.5 mm long; scaberulous.
    Fertile
    Spikelets comprising 4-5 fertile florets; with diminished florets at the apex. Spikelets lanceolate, or elliptic; laterally compressed; 8-9 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 1.5 mm long; scaberulous.
    Glume
    Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 4 mm long; 0.75 length of upper glume; chartaceous; without keels; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 5-5.5 mm long; 0.7-0.8 length of adjacent fertile lemma; chartaceous; without keels; 3 -veined. Upper glume primary vein scabrous. Upper glume apex acute.
    Florets
    Fertile lemma lanceolate; 6.5-7 mm long; chartaceous; mid-green and purple; suffused with last colour; without keel; 5 -veined. Lemma apex acute; awned; 1 -awned. Principal lemma awn 1.5 mm long overall. Palea 1 length of lemma; 2 -veined. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Anthers 3; 3.5 mm long. Ovary glabrous.
    Fruits
    Caryopsis with adherent pericarp; glabrous. Hilum linear.
    Distribution
    South America: southern South America.
    Reference
    Poeae. Turpe 1997.

    Distribution

    Native to:

    Argentina Northwest

    Festuca uninodis Hack. ex Stuck. appears in other Kew resources:

    First published in Anales Mus. Nac. Buenos Aires, ser. 3, 6: 524 (1906)

    Accepted by

    • Ospina, J.C. (2016). New lectotypifications and new synonyms in Festuca (Poaceae, Pooideae, Loliinae) from the Central Andes Phytotaxa 247: 247-258.
    • Zuloaga, F.O., Morrone, O. , Belgrano, M.J., Marticorena, C. & Marchesi, E. (eds.) (2008). Catálogo de las Plantas Vasculares del Cono Sur Monographs in Systematic Botany from the Missouri Botanical Garden 107: 1-3348.
    • 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
    • Zuloaga, F.O., Morrone, O. , Belgrano, M.J., Marticorena, C. & Marchesi, E. (eds.) (2008). Catálogo de las Plantas Vasculares del Cono Sur Monographs in Systematic Botany from the Missouri Botanical Garden 107: 1-3348.

    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