Deyeuxia parsana

HABIT Perennial; caespitose. Rhizomes absent. Culms erect, or geniculately ascending; 15–30 cm long. Lateral branches lacking. Leaf-sheaths scaberulous; glabrous on surface. Ligule an eciliate membrane; 2–3 mm long; erose, or lacerate. Leaf-blades 4–16 cm long; 1.2–1.8 mm wide. Leaf-blade surface smooth, or scaberulous; glabrous; hairless throughout. Leaf-blade apex attenuate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; oblong; 2–6 cm long; 0.5–1 cm wide. Primary panicle branches ascending; 0.3–0.6 cm long.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 0.6–2 mm long.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 5–5.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 0.5 length of lemma.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; 4–4.5 mm long; 0.75–0.8 length of upper glume; membranous; purple; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate; awned; 1 -awned. Lower glume awn 1–1.5 mm long. Upper glume lanceolate; 5–5.5 mm long; 1.2–1.4 length of adjacent fertile lemma; membranous; purple; 1-keeled; 3 -veined. Upper glume apex acuminate; awned; 1 -awned. Upper glume awn 1–1.5 mm long.

FLORETS Fertile lemma oblong; 3.5–4.5 mm long; membranous; without keel; 5 -veined. Lemma apex dentate; 2 -fid; truncate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.1 way up back of lemma; geniculate; 5.5–7.5 mm long overall; with twisted column. Palea hyaline; 2 -veined. Rhachilla extension pilose.

FLOWER Lodicules 2. Anthers 3; 2.2 mm long. Stigmas 2.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

DISTRIBUTION Asia-temperate: western Asia.

NOTES Aveneae. Fl Pak 1993.

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