1. Family: Poaceae Barnhart
    1. Genus: Panicum L.
      1. Panicum aequivaginatum Swallen

        This species is accepted, and its native range is N. South America to E. & S. Brazil.

    [GB]
    Habit
    Annual. Culms decumbent; 20-100 cm long; rooting from lower nodes. Culm-internodes 3.5-10.5 cm long; distally glabrous, or pilose. Culm-nodes constricted; pubescent. Leaf-sheaths 3-8.5 cm long; striately veined; glabrous on surface, or hispid; outer margin hairy. Ligule a ciliolate membrane; 0.3-0.6 mm long. Collar pubescent. Leaf-blade base broadly rounded, or cordate. Leaf-blades linear, or lanceolate; 3.5-12 cm long; 5-13 mm wide. Leaf-blade midrib conspicuous. Leaf-blade surface glabrous, or hispid. Leaf-blade margins scaberulous; tuberculate-ciliate. Leaf-blade apex acute.
    Inflorescences
    Inflorescence a panicle. Panicle open; ovate; effuse; 10-15 cm long; 3-7 cm wide. Primary panicle branches ascending. Panicle axis smooth; glabrous. Panicle branches flexuous; glabrous in axils, or pubescent in axils. Spikelets solitary, or in pairs. Fertile spikelets pedicelled. Pedicels smooth; glabrous.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 1.7-2.5 mm long; 0.7 mm wide; falling entire. Rhachilla internodes elongated between glumes.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 1.7-2.5 mm long; 0.7 mm wide; falling entire. Rhachilla internodes elongated between glumes.
    Glume
    Glumes dissimilar; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; not clasping; 0.9-1.3 mm long; 0.4-0.5 length of spikelet; membranous; without keels; 3 -veined. Lower glume lateral veins without connecting veins, or transversely connected at apex. Lower glume apex acuminate. Upper glume elliptic; 0.9 length of spikelet; membranous; without keels; 9 -veined. Upper glume lateral veins without cross-veins, or transversely connected at apex. Upper glume apex acute.
    Florets
    Basal sterile florets barren; with palea. Lemma of lower sterile floret similar to upper glume; elliptic; 1 length of spikelet; membranous; 9 -veined; acute. Palea of lower sterile floret 0.25-0.33 length of lemma. Fertile lemma elliptic; dorsally compressed; 1.6-1.9 mm long; 0.6 mm wide; indurate; without keel. Lemma surface papillose. Lemma margins involute. Lemma apex apiculate. Palea involute; indurate.
    Fruits
    Caryopsis with adherent pericarp; ellipsoid; light brown. Embryo 0.33 length of caryopsis. Hilum punctiform.
    Distribution
    South America: northern South America and Brazil.
    Reference
    Paniceae. Zuloaga 1994.

    Images

    Distribution

    Native to:

    Brazil Northeast, Brazil South, Brazil Southeast, Guyana, Venezuela

    Panicum aequivaginatum Swallen appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jan 1, 1989 Harley, R.M. [17383], Bahia K000003498 isotype
    Maguire [32564] K000309284 isotype
    de Silva Araújo, J. et al. [96], Bahia K000003511 isotype
    Jan 1, 1989 Lemos Froes, R. [19950], Bahia Panicum appressifolium K000003499 Unknown type material

    First published in Contr. U.S. Natl. Herb. 29: 271 (1948)

    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.
    • Boggan, J. Funck, V. & Kelloff, C. (1997). Checklist of the Plants of the Guianas (Guyana, Surinam, Franch Guiana) ed. 2: 1-238. University of Guyana, Georgetown.

    Literature

    Kew Backbone Distributions
    • Forzza, R.C. & al. (2013). Lista de Espécies da Flora do Brasil http://floradobrasil.jbrj.gov.br/2010/.
    • Hokche, O., Berry, P.E. & Huber, O. (eds.) (2008). Nuevo Catálogo de la Flora Vascular de Venezuela: 1-859. Fundación Instituto Botánico de Venezuela.
    • Boggan, J. Funck, V. & Kelloff, C. (1997). Checklist of the Plants of the Guianas (Guyana, Surinam, Franch Guiana) ed. 2: 1-238. University of Guyana, Georgetown.

    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