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  1. Family: Poaceae Barnhart
    1. Genus: Piresia Swallen
      1. Piresia leptophylla Soderstr.

        This species is accepted, and its native range is Colombia to Ecuador and N. & NE. Brazil.

    [GB]
    Habit
    Perennial; caespitose. Culms 20-35 cm long; wiry. Culm-nodes pubescent. Leaves cauline; 6-12 per branch. Ligule an eciliate membrane. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 5-6 cm long; 4-7 mm wide. Leaf-blade apex acute.
    Inflorescences
    Monoecious; with male and female spikelets in the same inflorescence. Synflorescence on the same culm as leaves (rarely), or on a separate leafless culm. Inflorescence composed of racemes. Racemes 1; single; 3.5-4 cm long; bearing few fertile spikelets; bearing 2-3 fertile spikelets on each (and 2-5 male). Sexes mixed. Spikelets solitary, or in pairs. Fertile spikelets pedicelled; 1 in the cluster. Male spikelets sessile; 1 in a cluster. Pedicels cuneate.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; 5-7 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Glume
    Glumes deciduous; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume ovate; 5-7 mm long; 1 length of upper glume; herbaceous; without keels; 5 -veined. Lower glume lateral veins with cross-veins. Lower glume apex acuminate. Upper glume ovate; 5-7 mm long; 1.2 length of adjacent fertile lemma; herbaceous; without keels; 5 -veined. Upper glume lateral veins with cross-veins. Upper glume apex acuminate.
    Florets
    Fertile florets female. Fertile lemma ovate; 5 mm long; indurate; pallid and dark brown; mottled with last colour; shiny; without keel; 5 -veined. Lemma lateral veins with cross-veins. Lemma surface pubescent. Lemma apex truncate. Palea indurate; 2 -veined.
    Flowers
    Anthers 3.
    Fruits
    Caryopsis with adherent pericarp; ovoid; 4 mm long. Embryo 0.2 length of caryopsis. Hilum linear; 1 length of caryopsis.
    Spikelets
    Male spikelets distinct from female; 1 flowered; separately deciduous; lanceolate; 4 mm long; glabrous. Male spikelet glumes absent. Male spikelet lemma 3 -veined; muticous. Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; 5-7 mm long; breaking up at maturity; disarticulating below each fertile floret.
    Male
    Male spikelets distinct from female; 1 flowered; separately deciduous; lanceolate; 4 mm long; glabrous. Male spikelet glumes absent. Male spikelet lemma 3 -veined; muticous.
    Distribution
    South America: western South America and Brazil.
    Reference
    Olyreae. WDC.
    [CPLC]

    Bernal, R., Gradstein, S.R. & Celis, M. (eds.). 2015. Catálogo de plantas y líquenes de Colombia. Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá. http://catalogoplantasdecolombia.unal.edu.co

    Distribution
    Nativa en Colombia; Alt. 100 m.; Amazonia.
    Habit
    Hierba
    Conservation
    No Evaluada

    Images

    Distribution

    Native to:

    Brazil North, Brazil Northeast, Colombia, Ecuador

    Other Data

    Piresia leptophylla Soderstr. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Nov 1, 2013 Santos, E.B. [237], Brazil K000997252
    Soderstrom, T.R. [2225], Bahia K000001204 isotype

    Bibliography

    First published in Brittonia 34: 206 (1982)

    Accepted by

    • Giraldo-Cañas, D. (2011). Catálogo de la familia Poaceae en Colombia Darwiniana 49: 139-247.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Jørgensen, P.M. & León-Yánez, S. (eds.) (1999). Catalogue of the Vascular Plants of Ecuador Monographs in Systematic Botany from the Missouri Botanical Garden 75: i-viii, 1-1181.

    Literature

    Kew Backbone Distributions

    • Forzza, R.C. & al. (2013). Lista de Espécies da Flora do Brasil http://floradobrasil.jbrj.gov.br/2010/.
    • Giraldo-Cañas, D. (2011). Catálogo de la familia Poaceae en Colombia Darwiniana 49: 139-247.
    • Jørgensen, P.M. & León-Yánez, S. (eds.) (1999). Catalogue of the Vascular Plants of Ecuador Monographs in Systematic Botany from the Missouri Botanical Garden 75: i-viii, 1-1181.

    Sources

    Catálogo de Plantas y Líquenes de Colombia
    http://creativecommons.org/licenses/by-nc-sa/3.0

    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