1. Family: Poaceae Barnhart
    1. Genus: Panicum L.
      1. Panicum longum Hitchc. & Chase

        This species is accepted, and its native range is Mexico (Veracruz).

    [GB]
    Habit
    Perennial. Culms geniculately ascending; 120-200 cm long. Culm-internodes distally glabrous. Culm-nodes glabrous. Lateral branches lacking, or sparse. Leaf-sheaths subequal to internodes; papillose; glabrous on surface, or hirsute; with tubercle-based hairs. Ligule a ciliolate membrane; 0.5 mm long. Leaf-blade base broadly rounded. Leaf-blades ascending, or spreading; 10-25 cm long; 6-12 mm wide. Leaf-blade surface pilose; sparsely hairy; hairy adaxially; with tubercle-based hairs. Leaf-blade apex attenuate.
    Inflorescences
    Inflorescence a panicle; exserted, or embraced at base by subtending leaf. Panicle open; lanceolate; 20-25 cm long; 2-5 cm wide. Primary panicle branches simple. Panicle axis hispid. Panicle branches secund; hispid. Spikelets in pairs. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; acute; 2 mm long; 0.9 mm wide; falling entire.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; acute; 2 mm long; 0.9 mm wide; falling entire.
    Glume
    Glumes similar; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 0.5 length of spikelet; membranous; without keels; 3 -veined. Lower glume surface asperulous; rough above and on veins. Lower glume apex acute. Upper glume ovate; 0.9 length of spikelet; membranous; without keels; 3 -veined. Upper glume surface asperulous; rough above and on veins. Upper glume apex acute.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret similar to upper glume; ovate; 1 length of spikelet; membranous; 5 -veined; acute. Fertile lemma elliptic; dorsally compressed; 2.1 mm long; 0.8 mm wide; indurate; without keel. Lemma surface asperulous; rough above. Lemma margins involute. Lemma apex acute. Palea involute; indurate.
    Distribution
    North America: Mexico.
    Reference
    Paniceae. Hitch. & Chase 2000.

    Images

    Distribution

    Native to:

    Mexico Gulf

    Panicum longum Hitchc. & Chase appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Pringle, C.G. [8195], Mexico K000309152

    First published in Contr. U.S. Natl. Herb. 15: 111 (1910)

    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 2019. 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 2019. 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