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  1. Family: Poaceae Barnhart
    1. Atractantha McClure

      1. This genus is accepted, and its native range is SE. Colombia to Venezuela and N. & E. Brazil.

    [GB]

    nonem

    Habit
    Perennial. Rhizomes short; pachymorph. Culms scandent; 456-973.6-2000 cm long; woody; without nodal roots (1/1). Culm-internodes terete. Culm-nodes with distinct supra-nodal ridge (1/1). Lateral branches dendroid. Branch complement one (1), or two (1), or three (2), or several (3), or many (1); in a horizontal line (2/2); with 1 branch dominant (4/4); thinner than stem. Culm-sheaths persistent (2/4), or deciduous but leaving a persistent girdle (4/4); without auricles (2/3), or auriculate (1/3). Culm-sheath blade linear (1/4), or lanceolate (1/4), or triangular (2/4); as wide as sheath at base (2/2). Leaf-sheath auricles absent, or erect (1). Ligule an eciliate membrane. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades linear (1), or lanceolate. Leaf-blade venation without cross veins (5), or with obscure cross veins (1).
    Inflorescences
    Synflorescence simple (1/5), or bractiferous (4/5); paniculate (2/4), or fasciculate (1/4), or globose (1/4); with glumaceous subtending bracts (4/4), or foliaceous subtending bracts (3/4); with axillary buds at base of spikelet (3/3). Inflorescence composed of racemes (1/1). Racemes single (1/1); bearing 8-13 fertile spikelets on each (1/1). Spikelets appressed (1/1), or ascending (1/1). Fertile spikelets sessile (1/5), or pedicelled (4/5).
    Spikelets
    Spikelets comprising 1 fertile florets (5/5); without rhachilla extension (3/5), or with a barren rhachilla extension (5/5), or with diminished florets at the apex (3/5). Spikelets linear (1/5), or lanceolate (5/5); subterete (5/5); 12.45-23.94-36 mm long; falling entire (4/5), or breaking up at maturity (1/5); disarticulating below each fertile floret (1/1). Rhachilla internodes brief up to lowest fertile floret (4/5), or elongated between glumes (1/5), or elongated below proximal fertile floret (1/5).
    Fertile
    Spikelets comprising 1 fertile florets (5/5); without rhachilla extension (3/5), or with a barren rhachilla extension (5/5), or with diminished florets at the apex (3/5). Spikelets linear (1/5), or lanceolate (5/5); subterete (5/5); 12.45-23.94-36 mm long; falling entire (4/5), or breaking up at maturity (1/5); disarticulating below each fertile floret (1/1). Rhachilla internodes brief up to lowest fertile floret (4/5), or elongated between glumes (1/5), or elongated below proximal fertile floret (1/5).
    Glume
    Glumes both absent or obscure (4/5), or two (1/5); shorter than spikelet (1/1); thinner than fertile lemma (1/1). Lower glume elliptic (1/1); membranous (1/1); without keels (1/1); 5 -veined (1/1). Lower glume apex awned (1/1). Upper glume lanceolate (1/1); membranous (1/1); without keels (1/1); 7 -veined (1/1). Upper glume mucronate (1/1), or awned (1/1); 1 -awned (1/1).
    Florets
    Fertile lemma lanceolate (5/5); subterete (5/5); chartaceous (2/5), or coriaceous (3/5); without keel (5/5); 7-9 -veined (2/3), or 10 -veined (1/3), or 11 -veined (2/3), or 12-15 -veined (1/3). Lemma lateral veins obscure (1/1). Lemma surface smooth (5/5), or scaberulous (1/5); glabrous (4/5), or pubescent (1/5). Lemma margins convolute (5/5); covering most of palea (5/5); eciliate (4/5), or ciliolate (1/5). Lemma apex acuminate (3/4), or setaceously attenuate (1/4); muticous (4/5), or pungent (1/5), or awned (1/5); 1 -awned (1/1). Palea tightly convolute around flower (5/5); 1-1.05-1.1 length of lemma; chartaceous (4/5), or coriaceous (1/5); 2 -veined (2/3), or 4 -veined (1/3). Palea keels separated (1/5), or approximate (3/5), or contiguous above a sulcus (1/5); eciliate (2/5), or ciliolate (4/5). Palea apex lobed (1/1). Apical sterile florets 1 in number (1/1); lanceolate (1/1).
    Flowers
    Lodicules absent (1/5), or 3 (4/5); membranous (4/4); glabrous (1/4), or ciliate (3/4). Anthers 3 (5/5). Stigmas 2 (5/5), or 3 (1/5). Ovary unappendaged (4/5), or umbonate (1/5); glabrous (2/4), or pubescent on apex (2/4).
    Fruits
    Caryopsis with adherent pericarp (5/5).
    Distribution
    South America.

    Images

    Distribution

    Native to:

    Brazil North, Brazil Northeast, Brazil Southeast, Colombia, Venezuela

    Accepted Species

    Other Data

    Atractantha McClure appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Argent, G.C.G. [6769], Brazil K001106382

    Bibliography

    First published in Smithsonian Contr. Bot. 9: 42 (1973)

    Accepted by

    • Govaerts, R.H.A. (2011). World checklist of selected plant families published update Facilitated by the Trustees of the Royal Botanic Gardens, Kew.

    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