1. Family: Poaceae Barnhart
    1. Genus: Ctenium Panz.
      1. Ctenium aromaticum (Walter) Alph.Wood

        This species is accepted, and its native range is New Jersey to SE. U.S.A.

    [GB]
    Habit
    Perennial; caespitose. Butt sheaths persistent and investing base of culm; with fibrous dead sheaths. Culms erect; 100-150 cm long. Leaf-sheaths scaberulous. Ligule an eciliate membrane; 1-3 mm long; erose. Leaf-blades flat, or involute; 5-10 cm long; 1-3 mm wide; aromatic. Leaf-blade surface smooth, or scaberulous.
    Inflorescences
    Inflorescence composed of racemes. Peduncle pubescent above. Racemes 1; single; arcuate; unilateral; 5-15 cm long. Rhachis semiterete; glabrous on surface; terminating in a barren extension; extension subulate. Spikelet packing broadside to rhachis; crowded; regular; 2 -rowed. Spikelets pectinate; solitary. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 2 basal sterile florets; 1 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 5-7 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose.
    Fertile
    Spikelets comprising 2 basal sterile florets; 1 fertile florets; with diminished florets at the apex. Spikelets cuneate; laterally compressed; 5-7 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose.
    Glume
    Glumes persistent; dissimilar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; 2.5 mm long; 0.3-0.5 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 5-7 mm long; 1.3 length of adjacent fertile lemma; herbaceous; with hyaline margins; 1-keeled; 3 -veined. Upper glume primary vein tuberculate. Upper glume surface tuberculate; rough on veins. Upper glume apex acute, or acuminate; awned; 1 -awned. Upper glume awn dorsal and oblique; 3-5 mm long.
    Florets
    Basal sterile florets dissimilar; barren; without significant palea; attached to and deciduous with the fertile. Lemma of lower sterile floret elliptic; 3-5 mm long; membranous; 1-keeled; ciliate on margins; fringed in the middle; acute; awned. Awn of lower sterile floret dorsal; 2-3 mm long. Lemma of upper sterile floret elliptic; 4-6 mm long; membranous; tufted on margins; fringed in the middle; acute; awned. Awn of upper sterile floret dorsal; curved; 4-5 mm long. Fertile lemma ovate; 4.5-5.5 mm long; membranous; keeled; 3 -veined. Lemma margins ciliate; hairy in the middle. Lemma apex awned; 1 -awned. Principal lemma awn subapical; 1-2 mm long overall. Palea 2 -veined. Apical sterile florets 1 in number; elliptic; 3-4 mm long.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    North America: southeast USA.
    Reference
    Cynodonteae. N Amer Fl 1993.

    Distribution

    Native to:

    Alabama, Florida, Georgia, Louisiana, Mississippi, New Jersey, North Carolina, South Carolina, Virginia

    Ctenium aromaticum (Walter) Alph.Wood appears in other Kew resources:

    First published in Class-book Bot.: 806 (1861)

    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.
    • 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 2018. 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 2018. 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