1. Family: Poaceae Barnhart
    1. Genus: Arthrostylidium Rupr.
      1. Arthrostylidium merostachyoides R.W.Pohl

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

    [GB]
    Habit
    Perennial; caespitose. Rhizomes short; pachymorph. Culms arching; 500-1000 cm long; 10-15 mm diam.; woody. Culm-internodes terete; thick-walled; yellow; distally glabrous. Lateral branches dendroid. Branch complement many; in a clump; subtended by a bare patch above the node. Culm-sheaths persistent; glabrous; without auricles. Culm-sheath ligule 0.5 mm high; ciliolate. Culm-sheath blade lanceolate; demarcated but persistent, or deciduous; acuminate. Leaves 4-7 per branch. Leaf-sheaths glabrous on surface; outer margin hairy. Leaf-sheath oral hairs setose; 7-16 mm long. Ligule a ciliolate membrane; 0.5-0.6 mm long. Leaf-blade base asymmetrical; with a brief petiole-like connection to sheath; petiole 0.15-0.25 cm long; petiole pubescent. Leaf-blades drooping; deciduous at the ligule; lanceolate, or oblong; 4-17 cm long; 10-26 mm wide. Leaf-blade surface glabrous. Leaf-blade margins pubescent; hairy at base. Leaf-blade apex acuminate.
    Inflorescences
    Inflorescence a panicle. Panicle contracted; oblong; secund; 2.5-8 cm long. Primary panicle branches indistinct the panicle almost racemose. Spikelets pectinate; in pairs. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 2-3 fertile florets; with diminished florets at the apex. Spikelets obovate; laterally compressed; 9.5-14 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Fertile
    Spikelets comprising 1 basal sterile florets; 2-3 fertile florets; with diminished florets at the apex. Spikelets obovate; laterally compressed; 9.5-14 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Glume
    Glumes persistent; shorter than spikelet. Lower glume oblong; 0.1-2.5 mm long; chartaceous; without keels; 1-3 -veined. Lower glume lateral veins absent, or distinct. Lower glume apex acute. Upper glume ovate; 2-3.5 mm long; 0.33-0.66 length of adjacent fertile lemma; 3-5 -veined. Upper glume apex acute.
    Florets
    Basal sterile florets barren; with palea, or without significant palea; persisting on inflorescence. Lemma of lower sterile floret similar to fertile lemma; ovate; 3.5-5 mm long; 3-7 -veined; acute. Fertile lemma lanceolate, or ovate; 6.2-8.2 mm long; chartaceous; keeled; 5-7 -veined. Lemma apex acute. Palea 1 length of lemma; 2 -veined. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 3; membranous; veined; glabrous. Anthers 3; 3.2-4.2 mm long. Stigmas 2. Ovary glabrous.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    South America: Mesoamericana.
    Reference
    Bambuseae. Pohl 1995.

    Distribution

    Native to:

    Costa Rica

    Arthrostylidium merostachyoides R.W.Pohl appears in other Kew resources:

    First published in Novon 2: 83 (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

    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