Bromus pannonicus

HABIT Perennial; culms solitary, or caespitose; clumped loosely. Rhizomes elongated. Butt sheaths persistent and investing base of culm; with compacted dead sheaths, or fibrous dead sheaths. Culms erect; 30–70(–130) cm long. Leaf-sheaths pilose. Ligule an eciliate membrane. Leaf-blades flat; 2–3 mm wide.

INFLORESCENCE Inflorescence a panicle.

Panicle open; lanceolate, or oblong; 8–12 cm long. Primary panicle branches appressed; 3–5 -nate; bearing 1 fertile spikelets on each lower branch.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 5–7 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 14–20 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; shorter than spikelet. Lower glume lanceolate; 6–7 mm long; 1 length of upper glume; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 6–7 mm long; 0.66 length of adjacent fertile lemma; membranous; without keels; 3 -veined. Upper glume apex acute.

FLORETS Fertile lemma oblong; 9 mm long; chartaceous; without keel; 7 -veined. Lemma surface scabrous; rough on veins. Lemma apex awned; 1 -awned. Principal lemma awn subapical; 7–8 mm long overall. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; membranous. Anthers 3; 3–4 mm long. Ovary with a fleshy appendage above style insertion; pubescent on apex.

FRUIT Caryopsis with adherent pericarp; hairy at apex; apex fleshy. Hilum linear.

DISTRIBUTION Europe: central and southeastern.

NOTES Bromeae. Fl Eur 1995.

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