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  1. Family: Poaceae Barnhart
    1. Genus: Arthrostylidium Rupr.
      1. Arthrostylidium judziewiczii Davidse

        This species is accepted, and its native range is Costa Rica to Panama.

    [GB]
    Habit
    Perennial; caespitose. Rhizomes short; pachymorph. Culms scandent; 200-400 cm long; 1-2 mm diam.; woody. Culm-internodes terete; thick-walled. Culm-nodes glabrous. Lateral branches dendroid; intravaginal. Bud complement 1. Branch complement one; solitary. Culm-sheaths deciduous; pubescent; hairy at the base; without auricles; setose on shoulders; shoulders with 4-9.5 mm long hairs. Culm-sheath blade lanceolate; constricted at base; deciduous; reflexed; 2-2.5 cm long; 3-4 mm wide. Leaves 1-6 per branch. Leaf-sheaths keeled; glabrous on surface; outer margin hairy. Leaf-sheath oral hairs setose; 4-9.5 mm long. Ligule an eciliate membrane; 0.3-1.5 mm long. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.16-0.3 cm long; petiole glabrous. Leaf-blades lanceolate; 6-13 cm long; 10-20 mm wide. Leaf-blade midrib indistinct. Leaf-blade venation with distinct cross veins. Leaf-blade surface glabrous. Leaf-blade margins scaberulous. Leaf-blade apex acuminate.
    Inflorescences
    Inflorescence composed of racemes; terminal and axillary; bracteate at pedicel base (in distal part of raceme). Peduncle glabrous. Racemes 1; single; bilateral; 8-14 cm long; bearing few fertile spikelets; bearing 4-6 fertile spikelets on each. Rhachis 1 mm wide; glabrous on surface. Spikelets solitary. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 5-6 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 35-65 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes flattened; 4-7 mm long; pubescent; hairy above. Floret callus pilose. Floret callus hairs 1-1.5 mm long.
    Fertile
    Spikelets comprising 1 basal sterile florets; 5-6 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 35-65 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes flattened; 4-7 mm long; pubescent; hairy above. Floret callus pilose. Floret callus hairs 1-1.5 mm long.
    Glume
    Glumes one the lower absent or obscure; persistent; shorter than spikelet. Upper glume ovate; asymmetrical; 5.5-6.5 mm long; 0.5-0.66 length of adjacent fertile lemma; 1-keeled, or 2-keeled; 6 -veined. Upper glume margins eciliate, or ciliolate. Upper glume apex acute; mucronate, or awned; 1 -awned. Upper glume awn 0.2-1.8 mm long.
    Florets
    Basal sterile florets barren; with palea, or without significant palea; persisting on inflorescence. Lemma of lower sterile floret similar to fertile lemma; ovate; 9 -veined; with conspicuous midvein; with cross-veins; acute; mucronate, or awned. Awn of lower sterile floret 0.5-1.3 mm long. Palea of lower sterile floret 0-0.5 length of lemma. Fertile lemma lanceolate; 8-11.5 mm long; chartaceous; keeled; 9 -veined. Lemma margins scaberulous. Lemma apex acute; mucronate, or awned; 1 -awned. Principal lemma awn 0.5-2 mm long overall. Palea 1 length of lemma; 2 -veined. Palea keels ciliolate. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 3; lanceolate; 3-3.5 mm long; membranous; veined; ciliate. Anthers 3; 3.8-5.1 mm long. Stigmas 2. Ovary pubescent on apex.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    South America: Mesoamericana.
    Reference
    Bambuseae. Davidse 1995.

    Images

    Distribution

    Native to:

    Costa Rica, Panamá

    Other Data

    Arthrostylidium judziewiczii Davidse appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jan 1, 1992 Grayum, M.H. [7024], Costa Rica K000433102 isotype

    Bibliography

    First published in Novon 2: 81 (1992)

    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.
    • Davidse, G. & al. (eds.) (1994). Flora Mesoamericana 6: 1-543. Universidad Nacional Autónoma de México, México, D.F.

    Literature

    Kew Backbone Distributions

    • Davidse, G. & al. (eds.) (1994). Flora Mesoamericana 6: 1-543. Universidad Nacional Autónoma de México, México, D.F.

    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