Phleum gibbum

HABIT Annual; culms solitary, or caespitose. Culms erect; 5–20 cm long; 3–4 -noded. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 2.5–4 mm long. Leaf-blades convolute; 0.8–5 cm long; 0.8–1.5 mm wide; stiff. Leaf-blade margins scabrous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle spiciform; linear; 0.7–4.3 cm long; 0.4–0.6 cm wide. Primary panicle branches accrescent to a central axis; with evident branchlets on axis.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets obovate, or cuneate; laterally compressed; gibbous; truncate; 2.5–3 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume elliptic; 1.8–2.2 mm long; 0.7–0.9 length of upper glume; coriaceous; 1-keeled; 3 -veined. Lower glume apex truncate. Upper glume elliptic; 2.4–2.6 mm long; 0.8–0.9 length of adjacent fertile lemma; coriaceous; 1-keeled; 3 -veined. Upper glume apex truncate.

FLORETS Fertile lemma oblong; 2.5–3 mm long; coriaceous; keeled; keeled above; 5 -veined. Lemma surface pubescent. Lemma apex rostrate; awned; 1 -awned. Principal lemma awn 0.4–0.6 mm long overall. Palea 1 length of lemma.

FLOWER Lodicules 2; membranous. Anthers 3. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp; 1.3 mm long. Hilum punctiform.

DISTRIBUTION Asia-temperate: western Asia.

NOTES Aveneae. Fl Turk.

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