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.

Mesosetum ansatum

HABIT Perennial. Stolons present. Culms erect; 12–33 cm long. Culm-nodes pubescent. Ligule a fringe of hairs. Leaf-blades 1.5–6 cm long; 1–3 mm wide. Leaf-blade margins cartilaginous.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; unilateral; 3–4.5 cm long. Rhachis broadly winged; membranous; 2–3 mm wide. Spikelet packing adaxial; regular; 2 -rowed.

Spikelets solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; acute; 2.7 mm long; falling entire. Spikelet callus pubescent.

GLUMES Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume elliptic; 1 length of spikelet; chartaceous; 1-keeled; keeled above; 3 -veined. Lower glume surface with a dorsal tuft of hair (at base). Lower glume apex lobed; 2 -fid; acute; awned; 1 -awned. Lower glume awn 3–6 mm long. Upper glume lanceolate; 1 length of spikelet; membranous; without keels; 3 -veined. Upper glume margins ciliate. Upper glume apex acute.

FLORETS Basal sterile florets male; with palea. Lemma of lower sterile floret oblong; 1 length of spikelet; hyaline; thicker on margins; 5 -veined; ciliate on margins; acute. Fertile lemma ovate; dorsally compressed; 2.5 mm long; coriaceous; without keel. Lemma margins flat. Lemma apex acuminate. Palea coriaceous.

DISTRIBUTION South America: Brazil.

NOTES Paniceae. Swallen.

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