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  1. Family: Poaceae Barnhart
    1. Genus: Calamagrostis Adans.
      1. Calamagrostis × baltica (Flüggé ex Schrad.) Trin.

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

    [GB]
    Habit
    Perennial; caespitose. Rhizomes elongated. Culms erect, or geniculately ascending; robust; 70-150 cm long. Leaf-sheaths without keel; smooth. Ligule an eciliate membrane; 10-25 mm long; acute. Leaf-blades flat, or involute; 50-100 cm long; 3-7 mm wide; stiff. Leaf-blade surface ribbed (above); scaberulous (above); glabrous, or puberulous (above). Leaf-blade apex attenuate; pungent.
    Inflorescences
    Inflorescence a panicle. Peduncle distinct; smooth, or scaberulous above. Panicle spiciform; lanceolate; tapering above; 13-25 cm long; 1.7-3 cm wide. Primary panicle branches 3-7 cm long. Panicle branches scabrous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 1-4 mm long; scabrous.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 9-12 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 5-7 length of lemma.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 9-12 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 5-7 length of lemma.
    Glume
    Glumes persistent; similar; exceeding apex of florets. Lower glume lanceolate; 9-12 mm long; chartaceous; 1-keeled; 1-3 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume surface asperulous. Lower glume apex acute. Upper glume lanceolate; 9-12 mm long; 1-keeled; 3 -veined. Upper glume primary vein scabrous. Upper glume apex acuminate.
    Florets
    Fertile lemma lanceolate; 7-9 mm long; cartilaginous; keeled; 3-7 -veined. Lemma surface asperulous. Lemma apex dentate; 2 -fid; awned. Principal lemma awn subapical; straight; 1-2 mm long overall. Palea 2-4 -veined. Palea keels scaberulous.
    Flowers
    Anthers 3; 4-4.5 mm long; indehiscent.
    Distribution
    Europe: northern, central, and southwestern.
    Reference
    Aveneae. Hubbard Brit Gr.

    Distribution

    Native to:

    Baltic States, Belgium, Denmark, France, Germany, Great Britain, Netherlands, Norway, Poland, Sweden

    Synonyms

    Other Data

    Calamagrostis × baltica (Flüggé ex Schrad.) Trin. appears in other Kew resources:

    Bibliography

    First published in Gram. Unifl. Sesquifl.: 227 (1824)

    Not 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. [Cited as Ammocalamagrostis baltica.]

    Literature

    Kew Backbone Distributions

    • Lambion, J., Delvosalle, L. & Duvigneaud, J. (2004). Nouvelle flore de la Belgique du G. D. de Luxembourg, du Nord de la France et des régions voisines, ed. 5: 1-1167. Edition du Patrimoine du Jardin botanique national de Belgique.
    • Tutin, T.G. & al. (eds.) (1980). Flora Europaea 5: 1-452. Cambridge University Press.

    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