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  1. Family: Poaceae Barnhart
    1. Genus: Calamagrostis Adans.
      1. Calamagrostis valida Sohns

        This species is accepted, and its native range is W. Mexico.

    [GB]
    Habit
    Perennial; caespitose. Rhizomes elongated. Culms 60-100 cm long. Ligule an eciliate membrane. Leaf-blades erect; involute; 10-30 cm long; 4-8 mm wide; stiff. Leaf-blade surface pilose; hairy adaxially.
    Inflorescences
    Inflorescence a panicle. Panicle open; oblong, or pyramidal; 10-20 cm long. Primary panicle branches 2-5 cm long. Panicle branches flexuous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform.
    Spikelets
    Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 5.5-6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 1.5-3.5 mm long.
    Fertile
    Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 5.5-6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 1.5-3.5 mm long.
    Glume
    Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; 5.5-6.5 mm long; 1 length of upper glume; membranous; much thinner above; much thinner on margins; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex attenuate. Upper glume lanceolate; 5.5-6.5 mm long; 1.3-1.5 length of adjacent fertile lemma; membranous; much thinner above; with hyaline margins; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex attenuate.
    Florets
    Fertile lemma lanceolate; 3.5-5 mm long; membranous; without keel; 3 -veined. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.5 way up back of lemma; geniculate; 5-10 mm long overall; with twisted column. Rhachilla extension 1-2 mm long; pilose; with 1.5-3 mm long hairs.
    Flowers
    Lodicules 2. Anthers 3. Stigmas 2.
    Fruits
    Caryopsis with adherent pericarp. Hilum punctiform. Disseminule comprising a floret.
    Distribution
    North America: Mexico.
    Reference
    Aveneae. Fl Nov Gal 1994.

    Images

    Distribution

    Native to:

    Mexico Northwest, Mexico Southwest

    Synonyms

    Other Data

    Calamagrostis valida Sohns appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    McVaugh, R. [13853], Mexico K000308412 isotype
    McVaugh, R. [13410], Mexico K000308414 isotype
    McVaugh, R. [13410], Mexico K000308415 isotype

    Bibliography

    First published in J. Washington Acad. Sci. 46: 385 (1957)

    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.
    • Dávila, P., Mejia-Saulés, M.T., Gómez-Sánchez, N., Valdés-Reyna, J., Ortíz, J.J., Morín, C., Castrejón, J. & Ocampo, A. (2006). Catálogo de las Gramíneas de México: 1-671. CONABIO, México city.

    Literature

    Kew Backbone Distributions

    • Dávila, P., Mejia-Saulés, M.T., Gómez-Sánchez, N., Valdés-Reyna, J., Ortíz, J.J., Morín, C., Castrejón, J. & Ocampo, A. (2006). Catálogo de las Gramíneas de México: 1-671. CONABIO, México city.

    Sources

    GrassBase - The Online World Grass Flora
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Herbarium Catalogue Specimens
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/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