|
Note - this takes you off
of our website |
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 campylostachya
HABIT Perennial; caespitose. Culms erect, or geniculately ascending, or decumbent; 50–90 cm long. Culm-nodes bearded. Leaf-sheaths keeled; glabrous on surface to pilose; with simple hairs, or tubercle-based hairs; outer margin glabrous, or hairy. Ligule an eciliate membrane; 0.8 mm long. Leaf-blades 6–20 cm long; 3–10 mm wide. Leaf-blade surface glabrous, or pubescent; hairy on both sides. Leaf-blade margins glabrous, or ciliate.
INFLORESCENCE Inflorescence composed of racemes. Peduncle glabrous, or pilose above.
Racemes 1; single; arcuate; unilateral; 4–10 cm long. Rhachis narrowly winged; folded longitudinally to embrace spikelets; 2 mm wide; glabrous on surface; glabrous on margins, or ciliate on margins; terminating in a barren extension; extension flattened. 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; 2.7–3 mm long; 0.8 mm wide; falling entire.
GLUMES Glumes dissimilar; shorter than spikelet; thinner than fertile lemma. Lower glume oblate; 0.3 mm long; 0.25–0.5 length of spikelet; hyaline; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex truncate. Upper glume elliptic; 0.66 length of spikelet; chartaceous; without keels; 5 -veined. Upper glume apex acute.
FLORETS Basal sterile florets male; with palea. Lemma of lower sterile floret elliptic; 1 length of spikelet; coriaceous; 5 -veined; without grooves, or sulcate; acute. Palea of lower sterile floret becoming indurate on flanks at maturity. Fertile lemma elliptic; 2.5 mm long; coriaceous; without keel. Lemma surface papillose and striate. Lemma margins involute; eciliate, or ciliolate. Lemma apex acute. Palea coriaceous.
FLOWER Lodicules 2; fleshy; truncate. Anthers 3.
DISTRIBUTION North America: Mexico. South America: Mesoamericana and western South America.
NOTES Paniceae. Burman 1993.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
