Agrostis pourretii

HABIT Annual. Culms erect, or geniculately ascending; 30–65 cm long; 3–5 -noded. Culm-internodes smooth. Leaf-sheaths antrorsely scabrous; glabrous on surface. Ligule an eciliate membrane; 3.5–5 mm long; lacerate. Leaf-blades flat, or conduplicate; 3–9 cm long; 1.5–2 mm wide. Leaf-blade surface scabrous.

INFLORESCENCE Inflorescence a panicle.

Panicle open; elliptic; 4–18 cm long; 0.5–6 cm wide. Primary panicle branches 4–7 -nate; whorled at most nodes. Panicle axis smooth.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 0.5–3.1 mm long; 0.25–1 length of fertile spikelet; scabrous.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 1.7–3.2 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; shiny; gaping. Lower glume lanceolate; 1.7–3.2 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; 1.7–3.2 mm long; 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; 0.8–1.6 mm long; hyaline; without keel; 5 -veined. Lemma lateral veins excurrent. Lemma apex erose; truncate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.5 way up back of lemma; geniculate; 3–4.8 mm long overall; with twisted column. Palea 0.1 mm long; 0.1 length of lemma; hyaline.

FLOWER Lodicules 2; membranous. Anthers 3; 0.7–1.4 mm long.

FRUIT Caryopsis with adherent pericarp; 0.8–0.9 mm long. Hilum linear.

DISTRIBUTION Europe: southwestern and southeastern. Africa: north and Macaronesia.

NOTES Aveneae. Gr Extremad 1993.

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