GrassBase - The Online World Grass Flora


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

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

Anadelphia chevalieri

HABIT Annual. Culms 100 cm long. Ligule a ciliolate membrane.

INFLORESCENCE Synflorescence compound; scanty; 10–30 cm long. Inflorescence composed of racemes; terminal and axillary; subtended by a spatheole; enclosed. Spatheole lanceolate; 4.5–5.5 cm long; scarious; purple.

Racemes 1; single; 3 cm long; bearing few fertile spikelets; bearing 2 fertile spikelets on each. Rhachis fragile at the nodes; ciliate on margins. Spikelet packing lax. Rhachis internodes filiform. Rhachis internode tip oblique.

Spikelets in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels filiform; 5 mm long; ciliate.

STERILE SPIKELETS Companion sterile spikelets well-developed; male; lanceolate; 15–25 mm long; longer than fertile; separately deciduous. Companion sterile spikelet callus oblong; 1 mm long; 2-toothed, or emarginate. Companion sterile spikelet glumes coriaceous; glabrous; setaceously attenuate; awned; one glume awned; with 1–3 mm long awn. Companion sterile spikelet lemmas 2; enclosed by glumes.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 10–13 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus linear; curved; 3–4 mm long; pubescent; base pungent; attached obliquely. Spikelet callus hairs white.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume oblong; 1 length of spikelet; coriaceous; dark brown; without keels; 6–7 -veined. Lower glume lateral veins obscure. Lower glume apex entire; truncate. Upper glume oblong; coriaceous; without keels. Upper glume apex entire; awned; 1 -awned. Upper glume awn 7–14 mm long.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret oblong; hyaline; 2 -veined; ciliate on margins. Fertile lemma oblong; 4.5 mm long; membranous; without keel; 1 -veined. Lemma apex lobed; 2 -fid; incised 0.4–0.5 of lemma length; awned; 1 -awned. Principal lemma awn from a sinus; bigeniculate; 50–70 mm long overall; with twisted column. Column of lemma awn 20–22 mm long; glabrous. Palea absent or minute.

FLOWER Anthers 3.

DISTRIBUTION Africa: west tropical.

NOTES Andropogoneae. FWTA.

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