Glyceria ischyroneura

HABIT Perennial; caespitose. Culms geniculately ascending, or decumbent; 70–120 cm long; 2–4 mm diam.; 4–7 -noded; rooting from lower nodes. Culm-internodes 3–10 cm long. Leaf-sheaths tubular for much of their length; with 1 of their length closed; smooth; glabrous on surface. Ligule an eciliate membrane. Leaf-blades 20–40 cm long; 5–10 mm wide. Leaf-blade surface glabrous.

INFLORESCENCE Inflorescence a panicle.

Panicle open; lanceolate, or ovate; equilateral, or nodding; 15–40 cm long; 3–7 cm wide. Primary panicle branches appressed; 3 -nate; 6–10 cm long. Panicle axis smooth, or with occasional prickles. Panicle branches smooth, or scabrous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 3–6 fertile florets; with diminished florets at the apex. Spikelets lanceolate, or oblong; laterally compressed; 5–7 mm long; 1.5–1.8 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes zig-zag; 1–1.5 mm long.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 0.8–1.2 mm long; 0.5–0.66 length of upper glume; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex obtuse. Upper glume lanceolate; 1.5–1.8 mm long; 0.75 length of adjacent fertile lemma; membranous; without keels; 1 -veined. Upper glume lateral veins absent. Upper glume apex obtuse.

FLORETS Fertile lemma ovate; 2–2.2 mm long; membranous; much thinner above; without keel; 7 -veined. Lemma surface scaberulous. Lemma apex obtuse. Palea bowed outwards; 1 length of lemma; 2 -veined. Palea surface scabrous. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; united; oblong; fleshy; truncate. Anthers 0.5–0.7 mm long.

FRUIT Caryopsis with adherent pericarp. Hilum linear.

DISTRIBUTION Asia-temperate: Soviet far east and eastern Asia.

NOTES Meliceae. Koyama 1994.

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