1. Family: Poaceae Barnhart
    1. Genus: Andropogon L.
      1. Andropogon vetus Sohns

        This species is accepted, and its native range is S. Colombia to S. Venezuela.

    [GB]
    Habit
    Perennial; caespitose. Culms erect; 100-400 cm long. Culm-internodes distally glabrous. Leaf-sheaths longer than adjacent culm internode; glabrous on surface. Leaf-sheath auricles erect. Ligule an eciliate membrane; 3-5 mm long. Leaf-blade base tapering to the midrib. Leaf-blades 30-60 cm long; 10-15 mm wide. Leaf-blade surface glabrous. Leaf-blade apex attenuate.
    Inflorescences
    Synflorescence compound; linear. Inflorescence composed of racemes; terminal and axillary; subtended by a spatheole; embraced at base by subtending leaf. Spatheole linear. Racemes 1; single; 1-3 cm long. Rhachis fragile at the nodes; villous on margins. Rhachis hairs 1-3 mm long. Rhachis internodes clavate; 2-3.5 mm long. Rhachis internode tip transverse; cupuliform; with simple rim. Spikelets in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels linear; 3.5-3.8 mm long; villous; hairy on margins.
    Sterile
    Companion sterile spikelets well-developed; comprising 2 subequal glumes without lemmas, or containing empty lemmas; lanceolate; 2.4-3.4 mm long; separately deciduous. Companion sterile spikelet glumes chartaceous.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 3.7-5.3 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus base obtuse; inserted. Companion sterile spikelets well-developed; comprising 2 subequal glumes without lemmas, or containing empty lemmas; lanceolate; 2.4-3.4 mm long; separately deciduous. Companion sterile spikelet glumes chartaceous.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 3.7-5.3 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus base obtuse; inserted.
    Glume
    Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of spikelet; coriaceous; 2-keeled; keeled laterally; 6 -veined. Lower glume primary vein scaberulous. Lower glume surface flat; glabrous. Upper glume linear; coriaceous; 1-keeled. Upper glume muticous.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret oblong; hyaline; 2-keeled. Fertile lemma lanceolate; 3-4 mm long; hyaline; without keel. Lemma apex lobed; 2 -fid; with lobes 1 mm long; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 10-25 mm long overall; with twisted column. Column of lemma awn glabrous. Palea 1.5-2 mm long; hyaline; 2-keeled. Palea keels ciliolate.
    Flowers
    Lodicules 2; 0.5-0.7 mm long. Anthers 3; 1.5-2 mm long.
    Distribution
    South America: northern South America and western South America.
    Reference
    Andropogoneae. Sohns 2004.
    [GB]
    Habit
    Perennial; caespitose. Culms erect; 200-300 cm long. Culm-internodes glaucous. Culm-nodes glabrous. Leaf-sheaths mostly shorter than adjacent culm internode; glabrous on surface. Ligule an eciliate membrane; 2 mm long. Leaf-blades 20-45 cm long; 10-15 mm wide. Leaf-blade midrib prominent beneath. Leaf-blade surface glabrous.
    Inflorescences
    Synflorescence compound; linear; 25-35 cm long; open. Inflorescence composed of racemes; terminal and axillary; subtended by a spatheole; embraced at base by subtending leaf. Spatheole lanceolate; 2-4 cm long. Racemes 1; single; 2-4 cm long. Rhachis fragile at the nodes; scabrous on surface; villous on margins. Rhachis internodes clavate; 3 mm long. Rhachis internode tip transverse; cupuliform; with simple rim. Spikelets in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels linear; villous; hairy on margins.
    Sterile
    Companion sterile spikelets well-developed; male; lanceolate; 2.5-3 mm long; separately deciduous. Companion sterile spikelet glumes chartaceous.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 4-5 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus base obtuse; inserted. Companion sterile spikelets well-developed; male; lanceolate; 2.5-3 mm long; separately deciduous. Companion sterile spikelet glumes chartaceous.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 4-5 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus base obtuse; inserted.
    Glume
    Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of spikelet; coriaceous; 2-keeled; keeled laterally; 4 -veined. Lower glume primary vein scaberulous; ciliolate. Lower glume surface concave. Upper glume linear; coriaceous; 1-keeled; 3 -veined. Upper glume primary vein pubescent (above). Upper glume muticous.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret oblong; hyaline; 2-keeled; ciliolate on margins. Fertile lemma lanceolate; 3-3.7 mm long; hyaline; without keel. Lemma apex lobed; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 15-20 mm long overall; with a straight or slightly twisted column. Column of lemma awn glabrous. Palea 2.5-3 mm long; hyaline; 2 -veined; 2-keeled.
    Flowers
    Lodicules 2; 0.5-0.7 mm long. Anthers 3; 1.5 mm long.
    Distribution
    South America: northern South America.
    Reference
    Andropogoneae. Sohns 2004.

    Distribution

    Native to:

    Colombia, Venezuela

    Andropogon vetus Sohns appears in other Kew resources:

    First published in Mem. New York Bot. Gard. 9: 277 (1957)

    Accepted by

    • Hokche, O., Berry, P.E. & Huber, O. (eds.) (2008). Nuevo Catálogo de la Flora Vascular de Venezuela: 1-859. Fundación Instituto Botánico de Venezuela.
    • 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
    • GBIF (2008- continuously updated). Global Biodiversity Information Facility http://www.gbif.org/.
    • Hokche, O., Berry, P.E. & Huber, O. (eds.) (2008). Nuevo Catálogo de la Flora Vascular de Venezuela: 1-859. Fundación Instituto Botánico de Venezuela.

    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