1. Family: Poaceae Barnhart
    1. Genus: Keratochlaena Morrone & Zuloaga
      1. Keratochlaena rigidifolia (Filg., Morrone & Zuloaga) Morrone & Zuloaga

        This species is accepted, and its native range is Brazil (Maranhão).

    [GB]
    Habit
    Perennial; caespitose. Rhizomes short. Culms erect; robust; 68-95 cm long. Culm-internodes terete; thin-walled; distally glabrous. Culm-nodes swollen; pubescent. Lateral branches lacking. Leaves basal and cauline. Leaf-sheaths striately veined; glabrous on surface, or pilose; outer margin hairy. Ligule a ciliate membrane; 1 mm long; pilose on abaxial surface. Leaf-blades lanceolate; 25-50 cm long; 5-8 mm wide; stiff. Leaf-blade surface glabrous, or pilose; sparsely hairy. Leaf-blade margins ciliate. Leaf-blade apex acuminate; pungent.
    Inflorescences
    Inflorescence composed of racemes. Peduncle 15-30 cm long; antrorsely scabrous above. Racemes 2-6; digitate; 9-11 cm long. Spikelets solitary. Fertile spikelets pedicelled. Pedicels with the longest adnate below to rhachis; oblong; 1-3 mm long.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 5-8 mm long; falling entire. Spikelet callus incorporating lowest rhachilla internode with adnate lower glume; 0.5 mm long. Rhachilla internodes elongated between glumes and elongated below basal sterile floret. Rhachilla elongation stout.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 5-8 mm long; falling entire. Spikelet callus incorporating lowest rhachilla internode with adnate lower glume; 0.5 mm long. Rhachilla internodes elongated between glumes and elongated below basal sterile floret. Rhachilla elongation stout.
    Glume
    Glumes dissimilar; shorter than spikelet; thinner than fertile lemma, or similar to fertile lemma in texture. Lower glume ovate; 3-6 mm long; 0.33-0.66 length of spikelet; membranous; without keels; 3(-5) -veined. Lower glume apex acute. Upper glume ovate; 5-6 mm long; 0.9-1 length of spikelet; coriaceous; without keels; 5 -veined. Upper glume lateral veins transversely connected at apex. Upper glume surface pubescent. Upper glume apex acute.
    Florets
    Basal sterile florets male; with palea. Lemma of lower sterile floret similar to upper glume; ovate; 5-6.5 mm long; 1 length of spikelet; coriaceous; 5 -veined; pilose; hairy above; acute. Palea of lower sterile floret hyaline; 4.5 mm long. Fertile lemma ovate; 4.5 mm long; 1.6 mm wide; indurate; pallid; shiny; without keel; 5 -veined. Lemma surface papillose. Lemma margins involute. Palea 1 length of lemma; indurate; without keels. Palea surface papillose.
    Flowers
    Lodicules 2; cuneate; 0.5-0.8 mm long; fleshy; truncate. Anthers 3; 3 mm long; purple.
    Fruits
    Caryopsis with adherent pericarp; ellipsoid; dorsally compressed; plano-convex; 3-3.5 mm long. Hilum linear; 1 length of caryopsis.
    Distribution
    South America: Brazil.
    Reference
    Paniceae. Filguiras et al 2001.

    Distribution

    Native to:

    Brazil Northeast

    Keratochlaena rigidifolia (Filg., Morrone & Zuloaga) Morrone & Zuloaga appears in other Kew resources:

    First published in Darwiniana 47: 231 (2009)

    Accepted by

    • Govaerts, R. (2019). World Checklist of Vascular Plants (WCVP Database) The Board of Trustees of the Royal Botanic Gardens, Kew.

    Literature

    Kew Backbone Distributions
    • Forzza, R.C. & al. (2013). Lista de Espécies da Flora do Brasil http://floradobrasil.jbrj.gov.br/2010/.

    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