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

        This species is accepted, and its native range is Central Mexico to Central America.

    [GB]
    Habit
    Perennial. Culms decumbent; 100-200 cm long; 4-5 mm diam.; rooting from lower nodes. Culm-internodes elliptical in section; 12-20 cm long. Culm-nodes glabrous, or pubescent. Lateral branches lacking, or sparse. Leaf-sheaths striately veined; glabrous on surface; outer margin hairy. Leaf-sheath oral hairs ciliate. Ligule a ciliolate membrane; 0.8 mm long. Leaf-blade base broadly rounded, or cordate. Leaf-blades lanceolate; 22-35 cm long; 15-30 mm wide. Leaf-blade surface pubescent; hairy adaxially. Leaf-blade apex acuminate.
    Inflorescences
    Inflorescence a panicle. Panicle open; pyramidal; 20-40 cm long; contracted about secondary branches. Primary panicle branches ascending, or spreading; 1-2 cm long; bearing spikelets almost to the base. Panicle axis scabrous. Panicle branches angular; secund; pubescent in axils. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 1.6-1.8 mm long; 0.4-0.5 mm wide; falling entire.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 1.6-1.8 mm long; 0.4-0.5 mm wide; falling entire.
    Glume
    Glumes dissimilar; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 0.6-0.9 mm long; 0.33-0.5 length of spikelet; membranous; 1-keeled; 1-3 -veined. Lower glume primary vein scaberulous. Lower glume apex acute. Upper glume elliptic; 0.9 length of spikelet; membranous; without keels; 3(-5) -veined. Upper glume surface scabrous. Upper glume apex obtuse, or acute.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret similar to upper glume; elliptic; 1 length of spikelet; membranous; 3 -veined; scabrous; acute. Fertile lemma elliptic; dorsally compressed; 1.5 mm long; 0.4 mm wide; chartaceous; pallid; without keel. Lemma margins flat (above), or involute (below). Lemma apex acute. Palea involute; chartaceous.
    Flowers
    Anthers 0.4-0.8 mm long.
    Distribution
    North America: Mexico. South America: Mesoamericana.
    Reference
    Paniceae. Chase 1994.

    Images

    Distribution

    Native to:

    Belize, Costa Rica, El Salvador, Guatemala, Honduras, Mexico Central, Mexico Gulf, Mexico Southeast, Nicaragua, Panamá

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

    Date Reference Identified As Barcode Type Status
    Hitchcock, A.S. [8388], Panama K000309299 isotype
    Bernouilli, G. [543], Guatemala K000309151 isotype

    First published in Contr. U.S. Natl. Herb. 17: 528 (1915)

    Accepted by

    • Nelson Sutherland, C.H. (2008). Catálogo de las plantes vasculares de Honduras. Espermatofitas: 1-1576. SERNA/Guaymuras, Tegucigalpa, Honduras.
    • 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.
    • Davidse, G. & al. (eds.) (1994). Flora Mesoamericana 6: 1-543. Universidad Nacional Autónoma de México, México, D.F.

    Literature

    Kew Backbone Distributions
    • Nelson Sutherland, C.H. (2008). Catálogo de las plantes vasculares de Honduras. Espermatofitas: 1-1576. SERNA/Guaymuras, Tegucigalpa, Honduras.
    • 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.
    • Davidse, G. & al. (eds.) (1994). Flora Mesoamericana 6: 1-543. Universidad Nacional Autónoma de México, México, D.F.

    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