1. Family: Poaceae Barnhart
    1. Genus: Festuca Tourn. ex L.
      1. Festuca pallescens (St.-Yves) Parodi

        This species is accepted, and its native range is S. Chile to W. Central & S. Argentina.

    [GB]
    Habit
    Perennial; caespitose. Basal innovations intravaginal. Culms erect; 25-80 cm long. Lateral branches lacking. Leaf-sheaths open for most of their length; smooth, or scaberulous. Ligule a ciliolate membrane; 0.5 mm long; glabrous on abaxial surface, or pubescent on abaxial surface. Leaf-blades filiform; conduplicate; 5-35 cm long; 1-1.5 mm wide; herbaceous; glaucous. Leaf-blade surface glabrous. Leaf-blade apex acute.
    Inflorescences
    Inflorescence a panicle. Panicle open; lanceolate; 5-15 cm long. Panicle axis scaberulous. Panicle branches scaberulous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels scaberulous.
    Spikelets
    Spikelets comprising 5-7 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 9-15 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 1.5-2.5 mm long.
    Fertile
    Spikelets comprising 5-7 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 9-15 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 1.5-2.5 mm long.
    Glume
    Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 4.5-5 mm long; 0.75 length of upper glume; chartaceous; without keels; 1 -veined. Lower glume primary vein smooth, or scabrous. Lower glume lateral veins absent. Lower glume surface smooth, or asperulous; rough at apex. Lower glume apex acuminate. Upper glume lanceolate; 5.5-7.5 mm long; 0.66-0.75 length of adjacent fertile lemma; chartaceous; without keels; 3 -veined. Upper glume primary vein smooth, or scabrous. Upper glume surface smooth, or asperulous; rough at apex. Upper glume apex acuminate.
    Florets
    Fertile lemma lanceolate; 6.5-11 mm long; chartaceous; without keel; 5 -veined. Lemma surface scaberulous; rough below. Lemma apex acute; awned; 1 -awned. Principal lemma awn 1-3 mm long overall. Palea 1 length of lemma; 2 -veined. Palea keels ciliolate. Palea surface scabrous. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Anthers 3; 3.5-4.5 mm long. Ovary pubescent on apex.
    Fruits
    Caryopsis with adherent pericarp. Hilum linear; 0.75 length of caryopsis.
    Distribution
    South America: southern South America.
    Reference
    Poeae. Fl Pat 1995.
    [GB]
    Habit
    Perennial; caespitose. Basal innovations intravaginal. Culms erect; 25-80 cm long. Lateral branches lacking. Leaf-sheaths open for most of their length; smooth, or scaberulous. Ligule a ciliolate membrane; 0.5 mm long; glabrous on abaxial surface, or pubescent on abaxial surface. Leaf-blades filiform; conduplicate; 5-35 cm long; 1-1.5 mm wide; herbaceous; glaucous. Leaf-blade venation comprising 11 vascular bundles; with 8 inner ridges; with 17 subepidermal sclerenchyma strands; with subepidermal sclerenchyma free from veins; with sclerenchyma strands widened to form a discontinuous subepidermal layer. Leaf-blade surface glabrous. Leaf-blade apex acute.
    Inflorescences
    Inflorescence a panicle. Panicle open; lanceolate; 5-15 cm long. Panicle axis scaberulous. Panicle branches scaberulous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels scaberulous.
    Spikelets
    Spikelets comprising 5-7 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 19-22.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 1.5-2.5 mm long.
    Fertile
    Spikelets comprising 5-7 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 19-22.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 1.5-2.5 mm long.
    Glume
    Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 10-12 mm long; 0.75 length of upper glume; chartaceous; without keels; 1 -veined. Lower glume primary vein smooth, or scabrous. Lower glume lateral veins absent. Lower glume surface smooth, or asperulous; rough at apex. Lower glume apex acuminate. Upper glume lanceolate; 12-15 mm long; 0.66-0.75 length of adjacent fertile lemma; chartaceous; without keels; 3 -veined. Upper glume primary vein smooth, or scabrous. Upper glume surface smooth, or asperulous; rough at apex. Upper glume apex acuminate.
    Florets
    Fertile lemma lanceolate; 9-15 mm long; chartaceous; without keel; 5 -veined. Lemma surface scaberulous; rough below. Lemma apex acute; awned; 1 -awned. Principal lemma awn 1-3 mm long overall. Palea 1 length of lemma; 2 -veined. Palea keels ciliolate. Palea surface scabrous. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Anthers 3; 4.5-5 mm long. Ovary glabrous.
    Fruits
    Caryopsis with adherent pericarp; glabrous. Hilum linear; 0.75 length of caryopsis.
    Distribution
    South America: southern South America.
    Reference
    Poeae. Alexeev 1997.

    Distribution

    Native to:

    Argentina Northwest, Argentina South, Chile South

    Festuca pallescens (St.-Yves) Parodi appears in other Kew resources:

    First published in Revista Argent. Agron. 20: 206 (1953)

    Accepted by

    • Ospina, J.C., Aliscioni, S.S. & Denham, S.S. (2015). A revision of Festuca (Loliinae, Pooideae, Poaceae) in Chile Phytotaxa 223(1): 1-66.
    • 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