1. Family: Poaceae Barnhart
    1. Homozeugos Stapf

      1. This genus is accepted, and its native range is Tanzania to S. Tropical Africa.

    [GB]

    nonem

    Habit
    Perennial. Rhizomes absent (4), or short (2). Culms erect (1/1); slender (1/1); 30-110-200 cm long. Lateral branches lacking (1/1). Leaf-sheath auricles absent (2), or erect (4). Ligule an eciliate membrane (5), or a ciliolate membrane (1). Leaf-blades filiform (2), or linear (4), or lanceolate (1). Leaf-blade midrib conspicuous (1/1).
    Inflorescences
    Inflorescence composed of racemes. Racemes single (3), or paired (2), or digitate (5); bearing 18-51 fertile spikelets on each (1/1). Rhachis fragile at the nodes; subterete. Rhachis internodes filiform (4), or linear (2). Rhachis internode tip oblique; flat. Spikelets appressed (1/1); in pairs. Fertile spikelets sessile and pedicelled; 2 in the cluster; subequal. Pedicels filiform (4), or linear (2); tip oblique.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 5-11.28-18 mm long; falling entire; deciduous from the base, or with accessory branch structures. Spikelet callus cuneate; pubescent (1), or pilose (5); base acute (1), or pungent (5); attached obliquely.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 5-11.28-18 mm long; falling entire; deciduous from the base, or with accessory branch structures. Spikelet callus cuneate; pubescent (1), or pilose (5); base acute (1), or pungent (5); attached obliquely.
    Glume
    Glumes exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate (1), or oblong (5); cartilaginous (1), or coriaceous (5); without keels; 5-6 -veined (1/5), or 7 -veined (2/5), or 8 -veined (3/5), or 9 -veined (2/5), or 10-11 -veined (1/5). Lower glume surface glabrous (1), or villous. Lower glume apex truncate (3), or obtuse (4). Upper glume linear (2/5), or lanceolate (2/5), or oblong (1/5); cartilaginous (1/5), or coriaceous (4/5); without keels (1/1); 3 -veined (4/4). Upper glume surface glabrous (3), or pilose (3), or villous (1). Upper glume apex obtuse (1/1).
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret linear (3), or lanceolate (1), or elliptic (1), or oblong (4), or ovate (1); hyaline; 2 -veined; emarginate (1/4), or obtuse (1/4), or acute (3/4). Fertile lemma linear; hyaline; without keel; 1 -veined. Lemma margins eciliate (3), or ciliolate (1), or ciliate (2). Lemma apex entire (1), or dentate (4), or lobed (1); 2 -fid (5/5); incised 0.33 of lemma length; acute (1/1); awned; 1 -awned. Principal lemma awn apical (1), or from a sinus (5); geniculate. Column of lemma awn glabrous (1), or hispidulous (2), or puberulous (1), or pubescent (1), or hirtellous (4). Palea present (3), or absent or minute (3); 0.1 length of lemma.
    Flowers
    Lodicules 2 (1/1). Anthers 3 (4/5), or 5 (1/5).
    Distribution
    Africa.
    [FTEA]

    Gramineae, W. D. Clayton, S. M. Phillips And S. A. Renvoize. Flora of Tropical East Africa. 1974

    Habit
    Tufted perennials
    Leaves
    Leaf-blades linear or terete; ligule short, or long and adnate to sheath-auricles
    Inflorescences
    Inflorescence composed of 1–6 digitate racemes, terminal on the culm; racemes villous, bearing paired spikelets on a fragile rhachis, those of each pair alike; internodes and pedicels linear
    Spikelets
    Spikelets terete, the callus sharply conical to pungent; lower glume coriaceous, convex across the back, ± 2-keeled towards the tip, obtuse; lower floret reduced to a hyaline lemma; upper lemma membranous, linear, bidentate, with ± hairy awn from the sinus; palea minute
    Fruits
    Caryopsis narrowly lanceolate.
    [FZ]

    Gramineae, T. A. Cope. Flora Zambesiaca 10:4. 2002

    Habit
    Inflorescence of 1–several digitate racemes; racemes fragile, villous, with linear internodes.
    Spikelets
    Spikelets alike, paired, one sessile, one pedicelled, terete, the callus acutely conical to pungent and obliquely attached to the internode.
    Glume
    Inferior glume coriaceous, convex, obtuse at the apex.
    Florets
    Inferior floret reduced to a hyaline lemma.
    Lemma
    Superior lemma linear, bidentate, with a puberulous or hirtellous awn.

    Images

    Distribution

    Native to:

    Angola, Malawi, Tanzania, Zambia, Zaïre

    Homozeugos Stapf appears in other Kew resources:

    First published in Hooker's Icon. Pl. 31: t. 3033 (1915)

    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.

    Literature

    Flora Zambesiaca
    • Clayton in Garcia de Orta, Sér. Bot. 1: 11–12 (1973).
    • in Hooker’s Icon. Pl. 31: t. 3033 (1915).
    Flora of Tropical East Africa
    • Clayton in Garcia da Orta, Bot. 1: 11 (1973)
    • in Hook., Ic. Pl. 31, t. 3033 (1915)

    Sources

    Flora Zambesiaca
    Flora Zambesiaca
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Flora of Tropical East Africa
    Flora of Tropical East Africa
    http://creativecommons.org/licenses/by-nc-sa/3.0

    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 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