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

        This species is accepted, and its native range is SE. New Jersey to SW. Georgia.

    [GB]
    Habit
    Perennial. Culms erect, or geniculately ascending; 55-80 cm long. Culm-internodes distally glabrous. Lateral branches sparse. Leaves all alike. Leaf-sheaths mostly shorter than adjacent culm internode; glabrous on surface; outer margin glabrous, or hairy. Ligule a fringe of hairs; 0.5 mm long. Leaf-blades erect, or ascending; 4.5-11 cm long; 3-5.5 mm wide. Leaf-blade surface glabrous.
    Inflorescences
    Inflorescence a panicle. Panicle contracted; linear; 4.5-9 cm long; 0.5 cm wide. Primary panicle branches appressed; 1-2.5 cm long. Panicle branches scaberulous. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 1.8-2.1 mm long; falling entire.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 1.8-2.1 mm long; falling entire.
    Glume
    Glumes dissimilar; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 0.5-0.8 mm long; 0.33 length of spikelet; membranous; without keels; 0 -veined. Lower glume lateral veins absent. Lower glume apex obtuse. Upper glume elliptic; 0.9 length of spikelet; membranous; without keels; 7 -veined. Upper glume apex obtuse.
    Florets
    Basal sterile florets barren. Lemma of lower sterile floret similar to upper glume; elliptic; 1 length of spikelet; membranous; 7 -veined. Fertile lemma elliptic; dorsally compressed; 1.8-2.1 mm long; indurate; pallid, or yellow; without keel. Lemma margins involute. Lemma apex acute. Palea involute; indurate.
    Distribution
    North America: northeast USA.
    Reference
    Paniceae. Swallen 2004.

    Distribution

    Native to:

    Delaware, Georgia, New Jersey, North Carolina

    Panicum hirstii Swallen appears in other Kew resources:

    First published in Rhodora 63: 236 (1961)

    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.

    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