1. Family: Poaceae Barnhart
    1. Exotheca Andersson

      1. This genus is accepted, and its native range is Eritrea to S. Tropical Africa, Indo-China.

    [GB]

    nonem

    Habit
    Perennial. Culms 30-200 cm long. Leaf-sheath auricles erect. Ligule an eciliate membrane.
    Inflorescences
    Synflorescence compound; scanty. Inflorescence composed of racemes; terminal and axillary; subtended by a spatheole. Spatheole linear; scarious. Racemes paired; end to end; bearing few fertile spikelets; bearing 1 fertile spikelets on each. Rhachis fragile at the nodes. Rhachis internodes linear. Rhachis internode tip oblique; flat. Raceme-bases filiform; unequal (the longer measured). Spikelets in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels filiform.
    Spikelets
    Basal sterile spikelets well-developed; forming an involucre about the fertile. Companion sterile spikelets well-developed; deciduous with the fertile. Companion sterile spikelet glumes muticous, or awned. Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 12-15 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus linear; pilose; base pungent; attached obliquely.
    Sterile
    Basal sterile spikelets well-developed; forming an involucre about the fertile. Companion sterile spikelets well-developed; deciduous with the fertile. Companion sterile spikelet glumes muticous, or awned.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 12-15 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus linear; pilose; base pungent; attached obliquely.
    Glume
    Glumes exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; coriaceous; without keels; 9 -veined. Lower glume lateral veins ribbed. Lower glume surface pubescent. Lower glume apex dentate; 2 -fid. Upper glume lanceolate; coriaceous; without keels; 3 -veined. Upper glume surface glabrous, or pubescent. Upper glume apex obtuse.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret oblong; hyaline; 2 -veined; obtuse. Fertile lemma linear; hyaline; without keel; 3 -veined. Lemma margins ciliolate. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate. Column of lemma awn pubescent. Palea hyaline. Palea keels ciliate.
    Distribution
    Africa, or Tropical Asia.
    [FZ]

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

    Habit
    Perennial.
    Ligules
    Ligule scarious, adnate to the sheath-auricles; leaf laminas linear.
    Inflorescences
    Inflorescence composed of paired racemes, the pairs each subtended by a spatheole and gathered into a scanty false panicle; racemes short, the superior borne on a very long raceme-base, its basal spikelets at ± the same level as the apex of the inferior raceme, the two thus appearing to be arranged end-to-end, each raceme with 2 homogamous spikelet pairs; pedicels linear.
    Fruits
    Caryopsis narrowly oblong.
    Spikelets
    Pedicelled spikelet male, without a distinct callus. Sessile spikelet terete; callus pungent, applied obliquely; inferior glume subcoriaceous with a herbaceous beak 2–3 mm long, rounded on the back and sides; superior glume awnless; inferior floret reduced to a hyaline lemma; superior lemma hyaline, bidentate, passing between the teeth into an awn with pubescent column.
    [FTEA]

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

    Habit
    Perennial
    Leaves
    Leaf-blades linear; ligule scarious, adnate to sheath-auricles
    Inflorescences
    Inflorescence composed of paired racemes subtended by spatheoles and forming a scanty false panicle; racemes short, arranged end to end with the upper borne upon a very long raceme-base, each raceme with 2 homogamous pairs; pedicels linear
    Spikelets
    Sessile spikelet terete; callus pungent, applied obliquely; lower glume subcoriaceous with a herbaceous beak 2–3 mm. long, rounded on back and sides; upper glume awnless; lower floret reduced to a hyaline lemma; upper lemma hyaline, bidentate, passing between the teeth into an awn with pubescent column
    Sessile
    Sessile spikelet terete; callus pungent, applied obliquely; lower glume subcoriaceous with a herbaceous beak 2–3 mm. long, rounded on back and sides; upper glume awnless; lower floret reduced to a hyaline lemma; upper lemma hyaline, bidentate, passing between the teeth into an awn with pubescent column
    Fruits
    Caryopsis narrowly oblong, Pedicelled spikelet ♂, without a distinct callus.

    Images

    Distribution

    Native to:

    Burundi, Eritrea, Ethiopia, Kenya, Malawi, Mozambique, Rwanda, Sudan, Tanzania, Uganda, Vietnam, Zambia, Zaïre

    Exotheca Andersson appears in other Kew resources:

    First published in Nova Acta Regiae Soc. Sci. Upsal., ser. 3, 2: 253 (1856)

    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 Kew Bull. 20: 447 (1966).
    • in Nova Acta Regiae Soc. Sci. Upsal., ser. 3, 2: 253 (1857).
    Flora of Tropical East Africa
    • Clayton in K.B. 20: 447 (1966)
    • in Nov. Act. Reg. Soc. Sci. Upsala, ser. 3, 2: 253 (1857)

    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