1. Family: Poaceae Barnhart
    1. Genus: Arthrostylidium Rupr.
      1. Arthrostylidium excelsum Griseb.

        This species is accepted, and its native range is Mexico (Chiapas) to Central America, Trinidad.

    [GB]
    Habit
    Perennial; caespitose. Rhizomes short; pachymorph. Culms leaning; 100-500 cm long; 2-3 mm diam.; woody. Culm-internodes terete; distally glabrous. Lateral branches dendroid. Branch complement two to several; in a clump; subtended by a bare patch above the node; with 1 branch dominant; thinner than stem. Leaf-sheaths glabrous on surface. Leaf-sheath oral hairs setose; 9-17 mm long. Ligule a ciliolate membrane; 0.1-0.2 mm long. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 10-16 cm long; 14-38 mm wide. Leaf-blade surface glabrous.
    Inflorescences
    Inflorescence composed of racemes. Racemes 1; single; sinuous (distally); bilateral; 9-16 cm long. Spikelet packing broadside to rhachis; distant. Spikelets appressed, or ascending; solitary. Fertile spikelets sessile.
    Spikelets
    Spikelets comprising 5-11 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 25-34 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 3-4 mm long; eventually visible between lemmas; glabrous.
    Fertile
    Spikelets comprising 5-11 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 25-34 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 3-4 mm long; eventually visible between lemmas; glabrous.
    Glume
    Glumes persistent; similar; shorter than spikelet. Lower glume elliptic; 4.5-6 mm long; 0.8-0.9 length of upper glume; chartaceous; without keels; 3 -veined. Lower glume apex acute. Upper glume elliptic; 5.3-6.9 mm long; 0.66-0.75 length of adjacent fertile lemma; without keels; 7 -veined. Upper glume apex acute.
    Florets
    Fertile lemma ovate; 8-9.5 mm long; chartaceous; without keel; 9-11 -veined. Lemma surface glabrous, or puberulous. Lemma apex obtuse. Palea 1 length of lemma. Apical sterile florets resembling fertile though underdeveloped.
    Flowers
    Lodicules 3. Anthers 3; 4.5-5 mm long. Ovary umbonate.
    Fruits
    Caryopsis with adherent pericarp.
    Distribution
    North America: Mexico. South America: Mesoamericana and Caribbean.
    Reference
    Bambuseae. Fl Meso-Am 1997.

    Images

    Distribution

    Native to:

    Guatemala, Honduras, Mexico Southeast, Nicaragua, Panamá, Trinidad-Tobago

    Arthrostylidium excelsum Griseb. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Dec 20, 1991 Purdie [s.n.], Dominica K000433117 lectotype
    Dec 20, 1991 Purdie [s.n.] K000433118 syntype

    First published in Fl. Brit. W. I.: 529 (1864)

    Accepted by

    • Nelson Sutherland, C.H. (2008). Catálogo de las plantes vasculares de Honduras. Espermatofitas: 1-1576. SERNA/Guaymuras, Tegucigalpa, Honduras.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Dávila, P., Mejia-Saulés, M.T., Gómez-Sánchez, N., Valdés-Reyna, J., Ortíz, J.J., Morín, C., Castrejón, J. & Ocampo, A. (2006). Catálogo de las Gramíneas de México: 1-671. CONABIO, México city.
    • Davidse, G. & al. (eds.) (1994). Flora Mesoamericana 6: 1-543. Universidad Nacional Autónoma de México, México, D.F.

    Literature

    Kew Backbone Distributions
    • Dávila, P., Mejia-Saulés, M.T., Gómez-Sánchez, N., Valdés-Reyna, J., Ortíz, J.J., Morín, C., Castrejón, J. & Ocampo, A. (2006). Catálogo de las Gramíneas de México: 1-671. CONABIO, México city.
    • 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 2018. 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 2018. 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