Agrostis rupestris

HABIT Perennial; caespitose. Culms erect, or geniculately ascending; 10–20 cm long; 2(–3) -noded. Culm-internodes smooth. Leaf-sheaths smooth; glabrous on surface. Ligule an eciliate membrane; 1.5–2 mm long; lacerate; acute. Leaf-blades filiform; convolute; 1.5–5 cm long; 1 mm wide.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; 3–5 cm long; 1–3 cm wide. Primary panicle branches ascending; 3–5 -nate; whorled at most nodes. Panicle axis smooth. Panicle branches smooth.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels clavate; 1.5–3.5 mm long; 0.75–1 length of fertile spikelet.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; 2–3.5 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; 2–3.5 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; 2–3.5 mm long; 1.1–1.6 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; 1.8–2.2 mm long; hyaline; without keel; 5 -veined. Lemma lateral veins extending close to apex. Lemma apex erose; truncate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.2 way up back of lemma; geniculate; 5 mm long overall; with twisted column. Palea 0.2 mm long; 0.1 length of lemma; hyaline.

FLOWER Lodicules 2; membranous. Anthers 3; 1–1.3 mm long.

FRUIT Caryopsis with adherent pericarp; 1.5 mm long. Hilum linear.

DISTRIBUTION Europe: central, southwestern, southeastern, and eastern. Africa: north.

NOTES Aveneae. Gr Extremad 1993.

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