1. Family: Poaceae Barnhart
    1. Myriocladus Swallen

      1. This genus is accepted, and its native range is N. South America to N. Brazil.

    [GB]

    nonem

    Habit
    Perennial. Rhizomes short; pachymorph. Culms erect; 45-277-800 cm long; firm (10), or wiry (1), or woody (1). Culm-internodes shorter and closely spaced at top of culm (3/4), or alternately elongated and bunched (1/4); terete. Lateral branches lacking (4), or sparse (6), or ample (4). Leaf-sheath auricles absent (11), or erect (1). Ligule an eciliate membrane (11), or a fringe of hairs (1). Leaf-blade base without a false petiole (8), or with a brief petiole-like connection to sheath (4). Leaf-blades persistent (9), or deciduous at the ligule (3); linear (2), or lanceolate (6), or oblong (2), or ovate (4); herbaceous (2), or coriaceous (10). Leaf-blade venation without cross veins (10), or with distinct cross veins (2). Leaf-blade margins cartilaginous (1/1).
    Inflorescences
    Inflorescence composed of racemes; terminal (10), or axillary (2). Racemes single (2), or borne along a central axis (10); appressed (2), or erect (1), or ascending (10), or spreading (2); unilateral (10/10); bearing few fertile spikelets (2), or many spikelets (10); bearing 3 fertile spikelets on each (1/2), or 4-5 fertile spikelets on each (2/2), or 6-7 fertile spikelets on each (1/2). Rhachis angular (1/1). Spikelets appressed (2/2); solitary. Fertile spikelets pedicelled. Pedicels oblong.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets (6), or 2 fertile florets (9), or 3 fertile florets (4), or 4 fertile florets (1); with a barren rhachilla extension (5), or with diminished florets at the apex (7). Spikelets linear (1), or elliptic (2), or oblong (9), or cuneate (1); laterally compressed; 3-6.472-12 mm long; breaking up at maturity; disarticulating below each fertile floret, or above glumes but not between florets (1). Rhachilla internodes brief up to lowest fertile floret (8), or elongated below proximal fertile floret (4); glabrous (6/8), or pubescent (2/8).
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets (6), or 2 fertile florets (9), or 3 fertile florets (4), or 4 fertile florets (1); with a barren rhachilla extension (5), or with diminished florets at the apex (7). Spikelets linear (1), or elliptic (2), or oblong (9), or cuneate (1); laterally compressed; 3-6.472-12 mm long; breaking up at maturity; disarticulating below each fertile floret, or above glumes but not between florets (1). Rhachilla internodes brief up to lowest fertile floret (8), or elongated below proximal fertile floret (4); glabrous (6/8), or pubescent (2/8).
    Glume
    Glumes persistent; shorter than spikelet; thinner than fertile lemma. Lower glume subulate (1), or linear (3), or lanceolate (8), or oblong (1); 1 -veined (1/1). Lower glume lateral veins absent (1), or distinct (11). Lower glume surface glabrous (7), or pubescent (3), or hispidulous (1), or hispid (1). Lower glume apex obtuse (3/8), or acute (2/8), or acuminate (1/8), or attenuate (2/8), or setaceously attenuate (1/8); muticous (11/11), or awned (1/11). Upper glume lanceolate (9), or elliptic (2), or ovate (1); 0.6-0.65-0.7 length of adjacent fertile lemma; membranous; without keels; 1 -veined (2/2), or 2-3 -veined (1/2). Upper glume surface glabrous (7), or pubescent (3), or hispidulous (2). Upper glume apex obtuse (2), or acute (7), or acuminate (1), or attenuate (1), or setaceously attenuate (1); muticous (9), or mucronate (2), or awned (3); 1 -awned (3/3).
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate (2), or ovate (10); membranous; 1 -veined (1/1); obtuse (6/11), or acute (2/11), or acuminate (2/11), or setaceously attenuate (2/11); muticous (11), or mucronate (2), or awned (2). Fertile lemma lanceolate (1), or elliptic (11); coriaceous; without keel; 5 -veined (1/1). Lemma surface without grooves (11), or with a median groove (1); glabrous (10), or pubescent (2). Lemma margins eciliate (6), or ciliolate (4), or ciliate (2), or pubescent (1). Lemma apex obtuse (6/10), or acute (3/10), or setaceously attenuate (1/10); without ornament (11), or pubescent (1); muticous, or mucronate (2), or awned (2); 1 -awned (2/2). Palea 1 length of lemma. Palea keels eciliate (9), or ciliate (3). Palea surface glabrous (7), or pubescent (6). Palea apex muticous (10), or with excurrent keel veins (2). Apical sterile florets 1 in number (7/7); barren (1/1); rudimentary (5/7), or linear (1/7), or ovate (1/7).
    Flowers
    Lodicules 3; membranous (1/1). Anthers 3. Stigmas 2. Ovary glabrous (1/1).
    Fruits
    Caryopsis with adherent pericarp; ovoid (1/1); isodiametric (1/1). Embryo 0.15 length of caryopsis. Hilum linear (1/1).
    Distribution
    South America.

    Images

    Distribution

    Native to:

    Brazil North, Guyana, Venezuela

    Myriocladus Swallen appears in other Kew resources:

    First published in Fieldiana, Bot. 28: 34 (1951)

    Accepted by

    • Govaerts, R. (2019). World Checklist of Vascular Plants (WCVP Database) The Board of Trustees of the Royal Botanic Gardens, Kew.

    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