Agrostis ambatoensis

HABIT Perennial. Culms 3–5 cm long; 1 -noded. Culm-internodes distally glabrous. Lateral branches lacking. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 0.2–0.3 mm long; erose. Leaf-blades flat, or conduplicate; 1–2 cm long; 0.5 mm wide. Leaf-blade surface glabrous. Leaf-blade margins scabrous.

INFLORESCENCE Inflorescence a panicle; comprising 7–9 fertile spikelets.

Panicle open; oblong; 1–2 cm long; bearing few spikelets. Primary panicle branches 3–6 in number.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 0.4–1.5 mm long; glabrous.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 1.8–2.2 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 2–2.2 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 1.8–2.1 mm long; 1.5–1.7 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume primary vein scabrous. Upper glume lateral veins absent. Upper glume apex acute.

FLORETS Fertile lemma elliptic; 1.2–1.3 mm long; hyaline; without keel; 5 -veined. Lemma apex erose; truncate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.66 way up back of lemma; straight; 0.6–1 mm long overall; not or scarcely exserted from spikelet. Palea 0.2 mm long; hyaline; 0 -veined.

FLOWER Lodicules 2; 0.2 mm long; membranous. Anthers 3.

FRUIT Caryopsis with adherent pericarp; ellipsoid; 1 mm long. Hilum linear.

DISTRIBUTION South America: southern South America.

NOTES Aveneae. Asteg 1997.

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