Agrostis uliginosa

HABIT Perennial; caespitose. Culms erect; 60–85 cm long. Culm-nodes brown; glabrous. Leaf-sheaths tight; 7–12 cm long; smooth, or scaberulous. Ligule an eciliate membrane; 3–5 mm long; obtuse. Leaf-blades 4–17 cm long; 2–6 mm wide. Leaf-blade surface smooth, or scabrous.

INFLORESCENCE Inflorescence a panicle.

Panicle open; pyramidal; 11–23 cm long. Primary panicle branches whorled at most nodes. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels pubescent.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 3.1–4.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose. Floret callus hairs 0.25 length of lemma.

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 primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 3.1–4.5 mm long; 1.5–2 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; 2–2.2 mm long; hyaline; without keel; 5 -veined. Lemma surface scaberulous; rough on veins. Lemma apex awned; 1 -awned. Principal lemma awn dorsal; arising 0.33–0.5 way up back of lemma; straight; 3.5–4 mm long overall. Palea 0.8–1 mm long; hyaline.

FLOWER Lodicules 2; membranous. Anthers 3; 0.5–0.8 mm long.

FRUIT Caryopsis with adherent pericarp; 1.5–1.6 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.