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GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Thrasya glaziovii
HABIT Perennial; caespitose. Culms erect; 50–70 cm long. Culm-nodes bearded. Leaf-sheaths keeled; pilose; with tubercle-based hairs; outer margin hairy. Ligule an eciliate membrane; 1.5 mm long; erose. Leaf-blades lanceolate; 8–15 cm long; 1.5–4 mm wide. Leaf-blade surface pubescent and pilose; hairy on both sides; with tubercle-based hairs. Leaf-blade margins ciliate. Leaf-blade apex acuminate.
INFLORESCENCE Inflorescence composed of racemes.
Racemes 1; single; arcuate; unilateral; 8–13 cm long. Rhachis broadly winged; folded longitudinally to embrace spikelets; 3–4 mm wide; pilose on surface; tuberculate on margins; ciliate on margins; terminating in a barren extension; extension flattened. Rhachis hairs white. Spikelet packing alternately adaxial and abaxial; regular; 1 -rowed.
Spikelets pectinate; 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; acute; 2.7 mm long; falling entire.
GLUMES Glumes dissimilar; shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 0.6 mm long; 0.1 length of spikelet; hyaline; without keels; 0 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume elliptic; 2.5 mm long; 1 length of adjacent fertile lemma; 0.9 length of spikelet; membranous; thinner along midline; without keels; 2 -veined. Upper glume primary vein absent. Upper glume surface glabrous, or pilose; hairy above. Upper glume margins ciliate. Upper glume apex acute.
FLORETS Basal sterile florets male; with palea. Lemma of lower sterile floret elliptic; 1 length of spikelet; coriaceous; sulcate and readily splitting into two halves; eciliate on midvein, or pubescent on midvein; ciliate on margins (above); acute. Palea of lower sterile floret becoming indurate on flanks at maturity. Fertile lemma elliptic; 2.5 mm long; coriaceous; pallid, or purple; without keel. Lemma margins involute. Lemma apex acute; pubescent. Palea coriaceous.
FLOWER Lodicules 2; fleshy; truncate. Anthers 3.
DISTRIBUTION South America: Brazil.
NOTES Paniceae. Burman 1993.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
