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  1. Family: Poaceae Barnhart
    1. Genus: Calamagrostis Adans.
      1. Calamagrostis diemii (Rúgolo) Soreng

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

    [GB]
    Habit
    Perennial; caespitose. Rhizomes elongated. Culms geniculately ascending; 10-25 cm long. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 1.5-3 mm long; erose; acute. Leaf-blades straight; conduplicate; 3-5 cm long; 1-2 mm wide; firm. Leaf-blade surface pilose; hairy adaxially. Leaf-blade apex abruptly acute; hooded.
    Inflorescences
    Inflorescence a panicle. Panicle contracted; linear; 3-6 cm long. Primary panicle branches appressed. Panicle branches with scattered hairs, or glabrous. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 3.6-4.1 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes elongated below proximal fertile floret. Rhachilla elongation 0.2-0.3 mm long. Floret callus pilose. Floret callus hairs 0.33 length of lemma.
    Fertile
    Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 3.6-4.1 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes elongated below proximal fertile floret. Rhachilla elongation 0.2-0.3 mm long. Floret callus pilose. Floret callus hairs 0.33 length of lemma.
    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 asperulous. Lower glume apex acute. Upper glume lanceolate; 1.4 length of adjacent fertile lemma; membranous; purple; 1-keeled; 1-3 -veined. Upper glume lateral veins absent, or obscure. Upper glume surface asperulous. Upper glume apex acute.
    Florets
    Fertile lemma lanceolate; 2.6-3 mm long; membranous; without keel; 5 -veined. Lemma surface scaberulous. Lemma apex entire, or erose; truncate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.66 way up back of lemma; straight; 3.5-4 mm long overall; not or scarcely exserted from spikelet. Rhachilla extension 0.8-1 mm long; pilose.
    Flowers
    Lodicules 2; 0.6-0.7 mm long. Anthers 3; 1.3-1.6 mm long; purple. Stigmas 2.
    Fruits
    Caryopsis with adherent pericarp; ovoid; sulcate on hilar side; 1.6-1.9 mm long. Embryo 0.25 length of caryopsis. Hilum punctiform. Disseminule comprising a floret.
    Distribution
    South America: southern South America.
    Reference
    Aveneae. Fl Pat 1995.

    Distribution

    Native to:

    Argentina South, Chile Central

    Synonyms

    Other Data

    Calamagrostis diemii (Rúgolo) Soreng appears in other Kew resources:

    Bibliography

    First published in Contr. U.S. Natl. Herb. 48: 200 (2003)

    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.

    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 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