Family:
Poaceae Barnhart
Genus:
Hordeum L.

Hordeum brachyatherum Phil.

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

[GB]
Morphology General Habit
Perennial. Culms 30-60 cm long. Leaf-sheath auricles absent. Ligule an eciliate membrane. Leaf-blades 4-5 mm wide. Leaf-blade surface scabrous; rough abaxially; pilose; hairy adaxially.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 1; single; bilateral; 4-8 cm long. Rhachis fragile at the nodes; flattened; ciliate on margins. Spikelet packing broadside to rhachis. Rhachis internodes oblong; 2 mm long; falling with spikelet above. Spikelets in threes. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets sessile, or pedicelled; 2 in the cluster. Pedicels oblong; 0-1.5 mm long.
Morphology Reproductive morphology Inflorescences Spikelets
Companion sterile spikelets well-developed; containing empty lemmas; lanceolate; dorsally compressed; 5.5-8 mm long; shorter than fertile; deciduous with the fertile. Companion sterile spikelet glumes coriaceous; 5.5-8 mm long. Companion sterile spikelet lemmas 1; enclosed by glumes; 2.5-6 mm long; 1-awned; with 2.5 mm long awn. Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets lanceolate; dorsally compressed; 7.5-9 mm long; falling entire; deciduous with accessory branch structures.
Sterile
Companion sterile spikelets well-developed; containing empty lemmas; lanceolate; dorsally compressed; 5.5-8 mm long; shorter than fertile; deciduous with the fertile. Companion sterile spikelet glumes coriaceous; 5.5-8 mm long. Companion sterile spikelet lemmas 1; enclosed by glumes; 2.5-6 mm long; 1-awned; with 2.5 mm long awn.
Fertile
Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets lanceolate; dorsally compressed; 7.5-9 mm long; falling entire; deciduous with accessory branch structures.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes collateral; similar; shorter than spikelet; gaping. Lower glume lanceolate; 6-7 mm long; 1 length of upper glume. Upper glume lanceolate; 6-7 mm long; 0.75 length of adjacent fertile lemma.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 7.5-9 mm long; coriaceous; without keel; 5 -veined. Lemma surface smooth, or scabrous; rough above. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn 2-3.5 mm long overall. Palea 1 length of lemma. Rhachilla extension 3-4 mm long. Apical sterile florets distinct from fertile; rudimentary.
Morphology Reproductive morphology Flowers
Lodicules 2; 1.4-1.5 mm long; membranous; ciliate; acute. Anthers 3; 2 mm long. Ovary pubescent on apex.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; hairy at apex. Hilum linear.
Distribution
South America: southern South America.
Reference
Triticeae. Fl Pat 1944.

Native to:

Chile Central, Chile South

Hordeum brachyatherum Phil. appears in other Kew resources:

First published in Anales Univ. Chile 94: 346 (1896)

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.
  • 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. Missouri Botanical Garden.

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. Missouri Botanical Garden.

  • 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 2022. 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 2022. 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