1. Family: Poaceae Barnhart
    1. Genus: Isachne R.Br.
      1. Isachne humbertiana A.Camus

        This species is accepted, and its native range is Madagascar.

    [GB]
    Habit
    Perennial. Culms erect, or geniculately ascending; 40-50 cm long. Culm-internodes striate; smooth; distally glabrous. Lateral branches sparse. Leaf-sheaths loose; mostly shorter than adjacent culm internode; outer margin hairy. Ligule a fringe of hairs. Leaf-blades lanceolate; 7-9 cm long; 5-6 mm wide; coriaceous. Leaf-blade venation prominent; with 6 secondary veins. Leaf-blade surface pilose; hairy adaxially. Leaf-blade margins cartilaginous; scaberulous. Leaf-blade apex acuminate.
    Inflorescences
    Inflorescence a panicle. Panicle open; ovate; 4.5-5.5 cm long; 3-3.5 cm wide. Primary panicle branches spreading; 1 -nate. Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform; 1-2.5 mm long.
    Spikelets
    Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 2 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.75-0.9 mm long.
    Fertile
    Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 2 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.75-0.9 mm long.
    Glume
    Glumes deciduous; similar; shorter than spikelet; thinner than fertile lemma. Lower glume lanceolate, or oblong; 1.7-1.8 mm long; 0.9 length of spikelet; membranous; without keels; 5 -veined. Lower glume lateral veins obscure. Lower glume surface pubescent; hairy at apex. Lower glume apex acuminate. Upper glume ovate; 1.7-1.8 mm long; 0.9 length of spikelet; membranous; without keels; 5 -veined. Upper glume lateral veins obscure. Upper glume surface puberulous; hairy at apex. Upper glume apex obtuse.
    Florets
    Fertile florets with the lowest dissimilar. Lowest fertile lemma bisexual; elliptic; 1.9-2 mm long. Fertile lemma elliptic; 1.3-1.4 mm long; coriaceous; without keel. Lemma margins involute. Lemma apex obtuse. Palea coriaceous.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    Africa: western Indian ocean.
    Reference
    Isachneae. Camus 2007.

    Images

    Distribution

    Native to:

    Madagascar

    Isachne humbertiana A.Camus appears in other Kew resources:

    First published in Bull. Soc. Bot. France 99: 142 (1952)

    Not 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. [Cited as Unplaced Name.]

    Literature

    Kew Backbone Distributions
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.

    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 2020. 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 2020. 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