Phleum exaratum

HABIT Annual; culms solitary, or caespitose. Culms erect, or geniculately ascending; 5–50 cm long; 4–5 -noded. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 2–5 mm long; obtuse. Leaf-blades 1–11.5 cm long; 2–6 mm wide. Leaf-blade margins scaberulous. Leaf-blade apex acute.

INFLORESCENCE Inflorescence a panicle; subtended by an unspecialized leaf-sheath, or an inflated leaf-sheath.

Panicle spiciform; linear; 1–10 cm long; 0.5–1.2 cm wide. Primary panicle branches accrescent to a central axis.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels oblong.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate, or oblong; laterally compressed; 3–5 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; similar; exceeding apex of florets. Lower glume oblong; 3–5 mm long; 1 length of upper glume; membranous; much thinner on margins; 1-keeled; 3 -veined. Lower glume primary vein ciliate. Lower glume apex acuminate; awned; 1 -awned. Lower glume awn 0.5–0.8 mm long. Upper glume oblong; 3–5 mm long; 2 length of adjacent fertile lemma; membranous; with hyaline margins; 1-keeled; 3 -veined. Upper glume primary vein ciliate. Upper glume apex acuminate; awned; 1 -awned. Upper glume awn 0.5–0.8 mm long.

FLORETS Fertile lemma ovate; 1.2–2.5 mm long; membranous; without keel; 5 -veined. Lemma surface pubescent; with clavate hairs. Lemma apex obtuse.

FLOWER Lodicules 2; membranous. Anthers 3; 1.2–2 mm long. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp; ellipsoid; 0.9–1.1 mm long. Hilum punctiform.

DISTRIBUTION Europe: southeastern. Asia-temperate: western Asia.

NOTES Aveneae. Fl Turk 1993.

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