Agrostis sesquiflora

HABIT Perennial; caespitose. Butt sheaths persistent and investing base of culm. Culms 10–30 cm long; 2 -noded. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 0.5–2.5 mm long; lacerate; obtuse, or acute. Leaf-blades 1–6.5 cm long; 0.5–2.5 mm wide. Leaf-blade surface smooth, or scaberulous; rough adaxially.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; linear; 2–6.5 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets elliptic; laterally compressed; 2–2.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent. Floret callus hairs 0.1–0.2 mm long.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 2–2.5 mm long; 1–1.1 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume lateral veins absent. Upper glume apex acute.

FLORETS Fertile lemma elliptic; 1.9–2.1 mm long; hyaline; without keel; 5 -veined. Lemma apex muticous. Palea 1.3–1.6 mm long; hyaline. Rhachilla extension 0.2–0.4 mm long; 0.25 length of fertile floret; pubescent; hairy at tip.

FLOWER Lodicules 2; 0.4–0.5 mm long; membranous. Anthers 3; 0.4–0.6 mm long.

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

DISTRIBUTION South America: southern South America.

NOTES Aveneae. Fl Pat 1995.

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