1. Family: Poaceae Barnhart
    1. Humbertochloa A.Camus & Stapf

      1. This genus is accepted, and its native range is Tanzania, Madagascar.

    [GB]

    nonem

    Habit
    Perennial. Culms decumbent; 50-72.5-100 cm long. Ligule a ciliolate membrane. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades elliptic (1), or ovate (1). Leaf-blade venation with obscure cross veins.
    Inflorescences
    Monoecious. Inflorescence composed of racemes. Racemes borne along a central axis; in a unilateral false spike; appressed; lanceolate; bearing 1 spikelet. Central inflorescence axis foliaceous; tip subulate. Rhachis deciduous from axis; broadly winged; terminating in a barren extension; extension flattened. Spikelets solitary. Fertile spikelets sessile. Male inflorescence terminal; similar to female; of racemes along a central axis. Male spikelets similar to female but less developed. Male spikelet glumes 2.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; with a barren rhachilla extension. Spikelets oblong; laterally compressed; gibbous; 8-9.5-11 mm long; falling entire; deciduous with accessory branch structures.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; with a barren rhachilla extension. Spikelets oblong; laterally compressed; gibbous; 8-9.5-11 mm long; falling entire; deciduous with accessory branch structures.
    Glume
    Glumes shorter than spikelet; thinner than fertile lemma. Lower glume subulate. Upper glume oblong; 0.33 length of adjacent fertile lemma; membranous; without keels; 5-7 -veined. Upper glume apex acute.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret oblong; coriaceous; 13-17 -veined; obtuse. Fertile florets female. Fertile lemma ovate; chartaceous; 7-11 -veined. Lemma margins involute. Lemma apex acuminate. Palea chartaceous; 2 -veined.
    Flowers
    Lodicules 2. Anthers 4 (1), or 5, or 6 (1).
    Male
    Male inflorescence terminal; similar to female; of racemes along a central axis. Male spikelets similar to female but less developed. Male spikelet glumes 2.
    Distribution
    Africa.
    [FTEA]

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

    Culms
    Culms slender, stiff, branched upwards
    Inflorescences
    Terminal inflorescences unisexual, the ♂ with 1–4-spiculate racemes, the ♀ with 1-spiculate racemes (in both cases vestigial spikelets may also be present); spikelets usually with a fine bristle extending beyond the upper floret Axillary inflorescences ♀, few-spiculate, the spikelets long-peduncled, with the glumes narrower and thinner than in the other spikelets.
    Male
    Male spikelets: lower glume subulate; upper glume ovate or elliptic, one-third the length of the spikelet, 1–3-nerved; lower lemma coriaceous, 3–7-nerved; upper lemma chartaceous, 5–7-nerved; palea 2-nerved; stamens 3–6
    Spikelets
    Female spikelets: lower glume subulate; upper glume lanceolate to ovate-oblong, one-third the length of the spikelet, 5–7-nerved; lower lemma about as long as the spikelet, tightly convolute and enclosing the upper floret, rounded on the back, thick and rigid, many-nerved; upper lemma as long as the spikelet, thinly coriaceous, 7–11-nerved; palea usually 2-nerved Male spikelets: lower glume subulate; upper glume ovate or elliptic, one-third the length of the spikelet, 1–3-nerved; lower lemma coriaceous, 3–7-nerved; upper lemma chartaceous, 5–7-nerved; palea 2-nerved; stamens 3–6
    Female
    Female spikelets: lower glume subulate; upper glume lanceolate to ovate-oblong, one-third the length of the spikelet, 5–7-nerved; lower lemma about as long as the spikelet, tightly convolute and enclosing the upper floret, rounded on the back, thick and rigid, many-nerved; upper lemma as long as the spikelet, thinly coriaceous, 7–11-nerved; palea usually 2-nerved

    Images

    Distribution

    Native to:

    Madagascar, Tanzania

    Humbertochloa A.Camus & Stapf appears in other Kew resources:

    First published in Bull. Soc. Bot. France 81: 467 (1934)

    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 of Tropical East Africa
    • in Bull. Soc. Bot. Fr. 108: 158 (1961)
    • in Bull. Soc. Bot. Fr. 81: 467 (1934)

    Sources

    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