Skip to main content
  1. Family: Poaceae Barnhart
    1. Genus: Calamagrostis Adans.
      1. Calamagrostis ampliflora Tovar

        This species is accepted, and its native range is Peru.

    [GB]
    Habit
    Perennial; caespitose. Rhizomes elongated. Culms erect; 100 cm long. Culm-internodes scaberulous. Leaf-sheaths scaberulous. Ligule an eciliate membrane; 7-10 mm long. Leaf-blades 25-55 cm long; 2-3 mm wide; coriaceous. Leaf-blade surface scabrous. Leaf-blade margins scabrous.
    Inflorescences
    Inflorescence a panicle. Panicle open; elliptic; 35 cm long; 9 cm wide. Primary panicle branches ascending; 15-23 cm long. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 1 length of fertile spikelet; pubescent.
    Spikelets
    Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 6.5-8 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes elongated below proximal fertile floret. Rhachilla elongation 0.5 mm long. Floret callus pubescent. Floret callus hairs 0.5-0.7 mm long.
    Fertile
    Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 6.5-8 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes elongated below proximal fertile floret. Rhachilla elongation 0.5 mm long. Floret callus pubescent. Floret callus hairs 0.5-0.7 mm long.
    Glume
    Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of upper glume; membranous; purple; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface scabrous. Lower glume apex acute. Upper glume lanceolate; 6.5-8 mm long; 1.3 length of adjacent fertile lemma; membranous; purple; 1-keeled; 3 -veined. Upper glume surface scabrous. Upper glume apex acute.
    Florets
    Fertile lemma lanceolate; 5-6 mm long; membranous; without keel. Lemma surface scabrous. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.33 way up back of lemma; geniculate; 6.5-7 mm long overall; with twisted column. Palea keels scaberulous. Rhachilla extension 2.5-3 mm long; pubescent; with 0.8-1.2 mm long hairs.
    Flowers
    Lodicules 2. Anthers 3. Stigmas 2.
    Fruits
    Caryopsis with adherent pericarp. Hilum punctiform. Disseminule comprising a floret.
    Distribution
    South America: western South America.
    Reference
    Aveneae. Tovar 1995.

    Distribution

    Other Data

    Calamagrostis ampliflora Tovar appears in other Kew resources:

    Bibliography

    First published in Mem. Mus. Hist. Nat. "Javier Prado" 11: 16 (1960)

    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.
    • Brako, L. & Zarucchi, J.L. (1993). Catalogue of the Flowering Plants and Gymnosperms of Peru Monographs in Systematic Botany from the Missouri Botanical Garden 45: i-xl, 1-1286.

    Literature

    Kew Backbone Distributions

    • Brako, L. & Zarucchi, J.L. (1993). Catalogue of the Flowering Plants and Gymnosperms of Peru Monographs in Systematic Botany from the Missouri Botanical Garden 45: i-xl, 1-1286.

    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 2020. 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 2020. 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