1. Family: Poaceae Barnhart
    1. Genus: Panicum L.
      1. Panicum longivaginatum H.St.John

        This species is accepted, and its native range is Hawaiian Islands.

    [GB]
    Habit
    Perennial. Culms erect; 50-70 cm long. Lateral branches lacking. Leaves cauline. Leaf-sheaths 5-11 cm long; glabrous on surface; outer margin hairy. Ligule a ciliate membrane; 1-1.5 mm long. Leaf-blades lanceolate; 6-12 cm long; 10-13 mm wide; coriaceous; stiff. Leaf-blade surface glabrous. Leaf-blade apex acuminate.
    Inflorescences
    Inflorescence a panicle. Panicle open; lanceolate; dense; 11-13 cm long. Primary panicle branches appressed. Panicle axis glabrous. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; acute; 2.8-3.5 mm long; falling entire.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; acute; 2.8-3.5 mm long; falling entire.
    Glume
    Glumes reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 0.3-1.2 mm long; 0.1-0.33 length of spikelet; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume elliptic; 2.8-3.5 mm long; 1 length of spikelet; membranous; without keels; 9 -veined. Upper glume apex acute.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret similar to upper glume; elliptic; 1 length of spikelet; membranous; 9 -veined; obtuse. Fertile lemma ovate; dorsally compressed; 2.2-2.8 mm long; indurate; without keel. Lemma margins involute. Lemma apex acute. Palea involute; indurate.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    Pacific: north-central.
    Reference
    Paniceae. WDC 1997.

    Distribution

    Panicum longivaginatum H.St.John appears in other Kew resources:

    First published in Phytologia 63: 370 (1987)

    Accepted by

    • Clayton, W.D. & Snow, N. (2010). A key to Pacific Grasses: 1-107. Kew Publishing, Royal Botanic Gardens, Kew.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Flora of North America Editorial Committee (2003). Flora of North America North of Mexico 25: 1-781. Oxford University Press, New York, Oxford.

    Literature

    Kew Backbone Distributions
    • Flora of North America Editorial Committee (2003). Flora of North America North of Mexico 25: 1-781. Oxford University Press, New York, Oxford.

    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 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