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Descriptions

W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Dilophotriche pobeguinii

HABIT Annual; caespitose. Culms 30–60 cm long. Ligule a fringe of hairs. Leaf-blades 6–10 cm long; 3–5 mm wide.

INFLORESCENCE Inflorescence a panicle; comprising 120–200 fertile spikelets (or more).

Panicle open; elliptic; 15–25 cm long.

Spikelets in threes. Fertile spikelets pedicelled; 3 in the cluster; subequal. Pedicels free; filiform; subequal; 0.5–1 mm long.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 0.5 mm long; pubescent; truncate.

GLUMES Glumes persistent; similar; reaching apex of florets; thinner than fertile lemma. Lower glume lanceolate; 3–3.5 mm long; 0.6–0.7 length of spikelet; chartaceous; dark brown; without keels; 3 -veined. Lower glume surface setose; hairy on veins; with tubercle-based hairs. Lower glume apex acute. Upper glume lanceolate; 5 mm long; 1 length of spikelet; chartaceous; dark brown; without keels; 3 -veined. Upper glume surface puberulous. Upper glume apex acute.

FLORETS Basal sterile florets male; with palea; separately deciduous. Lemma of lower sterile floret similar to upper glume; lanceolate; 5 mm long; 1 length of spikelet; chartaceous; 3 -veined; puberulous; acuminate. Fertile lemma lanceolate; 4 mm long; coriaceous; without keel; 7 -veined. Lemma surface pubescent; with a transverse row of hair tufts; bearing 2 hair tufts in all. Lemma margins involute; interlocking with palea keels. Lemma apex lobed; 2 -fid; awned; 3 -awned. Principal lemma awn from a sinus; geniculate; flat below; 10–16 mm long overall; with twisted column; deciduous; abscissing from top of lemma. Lateral lemma awns arising on apex of lobes; 4–5 mm long; shorter than principal. Palea 2 -veined. Palea keels approximate.

FLOWER Anthers 3; 1.5 mm long.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Africa: west tropical.

NOTES Arundinelleae. WDC.

Please cite this publication as detailed in How to Cite Version: 3rd February 2016.