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Descriptions

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

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

Loudetia jaegeriana

HABIT Perennial. Culms prostrate; 15–30 cm long. Ligule a fringe of hairs. Leaf-blades spreading; 2–5 cm long; 1.5–3 mm wide.

INFLORESCENCE Inflorescence a panicle; comprising 4–15 fertile spikelets; bearing juvenile spikelets at emergence.

Panicle open; elliptic; 4–5 cm long; bearing few spikelets.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 8–9 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 0.5 mm long; bearded; truncate.

GLUMES Glumes persistent; dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 4–5 mm long; 0.5 length of spikelet; chartaceous; dark brown, or purple; without keels; 3 -veined. Lower glume surface glabrous, or hispid; with tubercle-based hairs. Lower glume apex acuminate. Upper glume lanceolate; 1 length of spikelet; chartaceous; dark brown, or purple; without keels; 3 -veined. Upper glume surface glabrous, or hispid; with tubercle-based hairs. Upper glume apex acuminate.

FLORETS Basal sterile florets male; with palea; separately deciduous. Lemma of lower sterile floret similar to upper glume; lanceolate; 8–9 mm long; 1 length of spikelet; 3 -veined; acute. Fertile lemma oblong; 3.5–4 mm long; coriaceous; without keel; 5 -veined. Lemma surface pubescent. Lemma margins involute; interlocking with palea keels. Lemma apex dentate; 2 -fid; with triangular lobes; incised 0.2 of lemma length; acute; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; flat below; 15–20 mm long overall; with twisted column; deciduous; abscissing from top of lemma. Palea 2 -veined. Palea keels approximate; thickened.

FLOWER Anthers 2; anther tip smooth.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Africa: west tropical.

NOTES Arundinelleae. FWTA.

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