Thrasya crucensis

HABIT Perennial; caespitose. Culms erect. Lateral branches lacking. Leaves cauline. Ligule an eciliate membrane. Leaf-blades 4–25 cm long; 2–4 mm wide.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; unilateral; 5–15 cm long. Rhachis broadly winged; folded longitudinally to embrace spikelets; 3 mm wide; ciliate on margins; terminating in a barren extension; extension flattened. Spikelet packing alternately adaxial and abaxial; regular; 1 -rowed.

Spikelets in pairs. Fertile spikelets sessile and pedicelled; 2 in the cluster. Pedicels fused to internode; united wholly.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 3 mm long; falling entire.

GLUMES Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume lanceolate; 0.33 length of spikelet; membranous; without keels. Lower glume surface pubescent, or pilose. Upper glume lanceolate; 1 length of spikelet; membranous; without keels. Upper glume surface pubescent, or pilose. Upper glume apex acute.

FLORETS Basal sterile florets male; with palea. Lemma of lower sterile floret elliptic; 1 length of spikelet; coriaceous; pubescent, or pilose. Fertile lemma elliptic; 3 mm long; coriaceous; without keel. Lemma margins involute. Lemma apex acute. Palea coriaceous.

DISTRIBUTION South America: western South America.

NOTES Paniceae. Gr Bolivia 1997.

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