Hakonechloa macra

HABIT Perennial. Rhizomes elongated; scaly. Stolons present. Culms erect; 40–70 cm long; 1–1.5 mm diam.; 6–8 -noded. Leaves cauline. Leaf-sheath oral hairs pubescent. Ligule a ciliolate membrane. Leaf-blades lanceolate; 8–25 cm long; 4–12 mm wide.

INFLORESCENCE Inflorescence a panicle; comprising 15–20 fertile spikelets.

Panicle open; ovate; 6–12 cm long; 5–7 cm wide; bearing few spikelets. Primary panicle branches 2 -nate. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform; glabrous, or ciliate; hairy above and below (base & tip).

FERTILE SPIKELETS Spikelets comprising 5–10 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; 10–20 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.3–0.4 mm long. Floret callus elongated; 1.5–2 mm long; pilose.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 3–4 mm long; 0.75 length of upper glume; membranous; 1-keeled; 1–3 -veined. Lower glume apex acuminate. Upper glume lanceolate; 3.8–5 mm long; 0.7 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; 6–7 mm long; membranous; keeled; 3 -veined. Lemma margins ciliate; hairy below. Lemma apex acute; awned; 1 -awned. Principal lemma awn 3–4.5 mm long overall. Palea oblong; 0.8 length of lemma; 2 -veined. Palea keels ciliate. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Anthers 3; 2–3 mm long.

FRUIT Caryopsis with free soft pericarp; oblong; 2 mm long.

DISTRIBUTION Asia-temperate: eastern Asia.

NOTES Arundineae. Koyama.

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