Skip to main content
  1. Family: Poaceae Barnhart
    1. Genus: Arthrostylidium Rupr.
      1. Arthrostylidium schomburgkii (Benn.) Munro

        This species is accepted, and its native range is Venezuela (Amazonas).

    [GB]
    Habit
    Perennial; caespitose. Rhizomes short; pachymorph. Culms leaning; 1000-1500 cm long; 15-35 mm diam.; woody. Culm-internodes unequal, the lower longer; terete; thin-walled; 300-500 cm long (lowest), or 35-45 cm long; light green; smooth; distally glabrous. Lateral branches dendroid. Bud complement 1. Branch complement several; in a clump; subtended by a bare patch above the node; with 1 branch dominant; thinner than stem. Leaves 4-7 per branch. Leaf-sheaths glabrous on surface. Leaf-sheath oral hairs scanty; 5-15 mm long. Ligule a ciliolate membrane; 0.2 mm long. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.2-0.3 cm long. Leaf-blades lanceolate; 17-23 cm long; 9-12 mm wide. Leaf-blade midrib prominent beneath. Leaf-blade margins scabrous. Leaf-blade apex acuminate.
    Inflorescences
    Inflorescence composed of racemes. Peduncle 10-15 cm long. Racemes 1; single; bilateral; 15-25 cm long; bearing 5-8 fertile spikelets on each. Rhachis semiterete; glabrous on surface. Spikelet packing broadside to rhachis; distant. Spikelets appressed; solitary. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 4-15 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 40-70 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes elongated between glumes. Rhachilla elongation 2.5-3 mm long. Rhachilla internodes 3-5 mm long.
    Fertile
    Spikelets comprising 1 basal sterile florets; 4-15 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 40-70 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes elongated between glumes. Rhachilla elongation 2.5-3 mm long. Rhachilla internodes 3-5 mm long.
    Glume
    Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 6-16 mm long; 0.6-1 length of upper glume; chartaceous; without keels; 1-5 -veined. Lower glume lateral veins absent, or obscure. Lower glume apex acute. Upper glume lanceolate; 10-16 mm long; 0.75 length of adjacent fertile lemma; without keels; 3-5 -veined. Upper glume apex acute; awned; 1 -awned. Upper glume awn 2-4 mm long.
    Florets
    Basal sterile florets barren; with palea; persisting on inflorescence. Lemma of lower sterile floret present; similar to fertile lemma. Fertile lemma elliptic, or ovate; 13-18 mm long; 3-4 mm wide; chartaceous; without keel; 7 -veined. Lemma lateral veins prominent. Lemma apex acute; awned; 1 -awned. Principal lemma awn 4-7 mm long overall. Palea elliptic; 8-9 mm long. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 3; lanceolate; 3-4 mm long; glabrous. Anthers 3; 6.5 mm long; yellow. Filaments 0.5 mm long. Stigmas 2.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    South America: northern South America.
    Reference
    Bambuseae. Jud. & Clarke 2001.

    Images

    Distribution

    Native to:

    Venezuela

    Synonyms

    Other Data

    Arthrostylidium schomburgkii (Benn.) Munro appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Schomburgk [s.n.], Guyana K000433134

    Bibliography

    First published in Trans. Linn. Soc. London 26: 41 (1868)

    Accepted by

    • Hokche, O., Berry, P.E. & Huber, O. (eds.) (2008). Nuevo Catálogo de la Flora Vascular de Venezuela: 1-859. Fundación Instituto Botánico de Venezuela.
    • 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

    • Hokche, O., Berry, P.E. & Huber, O. (eds.) (2008). Nuevo Catálogo de la Flora Vascular de Venezuela: 1-859. Fundación Instituto Botánico de Venezuela.

    Sources

    GrassBase - The Online World Grass Flora
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Herbarium Catalogue Specimens
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/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