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.

Homozeugos conciliatum

HABIT Perennial; caespitose. Rhizomes short; knotty. Culms 65–190 cm long; 0.6–4 mm diam. Culm-internodes distally glabrous, or pubescent. Culm-nodes bearded. Lateral branches lacking. Leaf-sheath auricles erect. Ligule an eciliate membrane; 0.5–48 mm long; entire, or erose; truncate, or obtuse. Leaf-blades linear, or lanceolate; flat, or involute; 10–72 cm long; 0.2–6.3 mm wide. Leaf-blade midrib conspicuous. Leaf-blade margins smooth, or scaberulous.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1–5; single, or paired, or digitate; 8.5–30 cm long; bearing 18–51 fertile spikelets on each. Rhachis fragile at the nodes; subterete. Rhachis internodes linear; 2.2–14.3 mm long. Rhachis internode tip oblique; flat.

Spikelets appressed; in pairs. Fertile spikelets sessile and pedicelled; 2 in the cluster; subequal. Pedicels linear; 3.2–10 mm long; villous; with white hairs; with 5–8.5 mm long hairs; tip oblique.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets linear; subterete; 5–12 mm long; falling entire; deciduous from the base and with accessory branch structures. Spikelet callus cuneate; 0.8–4.2 mm long; pilose; base pungent; attached obliquely. Spikelet callus hairs 2–5 mm long.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume oblong; 5.4–11 mm long; 1 length of spikelet; coriaceous; much thinner above; without keels; keel-less except near apex. Lower glume surface glabrous, or villous. Lower glume hairs 0–7 mm long. Lower glume apex obtuse. Upper glume oblong; 5.2–12 mm long; coriaceous; without keels. Upper glume surface glabrous, or villous. Upper glume hairs 0–5 mm long.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret linear to ovate; 4.8–10.2 mm long; hyaline; 2-keeled; 2 -veined; ciliate on margins; emarginate, or acute. Fertile lemma linear; 3.5–10 mm long; hyaline; without keel; 1 -veined. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 14–83 mm long overall; with twisted column. Column of lemma awn glabrous to pubescent; with 0–2 mm long hairs. Palea 0.5–2.5 mm long.

FLOWER Lodicules 2; cuneate; 0.4–0.9 mm long. Anthers 5; 3–7.2 mm long.

DISTRIBUTION Africa: southern tropical.

NOTES Andropogoneae. Guala 1998.

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