Pleioblastus oleosus

HABIT Perennial. Rhizomes elongated; leptomorph. Culms erect; 300–500 cm long; 10–30 mm diam.; woody. Culm-internodes terete; hollow; 35–40 cm long; distally pubescent. Culm-nodes flush with internodes. Lateral branches dendroid. Culm-sheaths deciduous; green; pilose; hairy below; with yellow hairs; glabrous on margins; auriculate; glabrous on shoulders, or ciliate on shoulders. Culm-sheath ligule entire. Culm-sheath blade linear; reflexed. Leaves 3–4 per branch. Leaf-sheaths 5.5 cm long; reticulately veined; glabrous on surface; outer margin hairy. Leaf-sheath oral hairs lacking. Leaf-sheath auricles absent. Ligule a ciliolate membrane; truncate. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 10–18 cm long; 13–22 mm wide; chartaceous. Leaf-blade venation with distinct cross veins. Leaf-blade margins scabrous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence comprising only a few spikelets.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 11–12 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 60 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes two, or several; 2–4 empty glumes; persistent.

FLORETS Fertile lemma ovate; 12–13 mm long; 6 mm wide; chartaceous. Lemma surface glabrous. Lemma apex acute. Palea 1 length of lemma. Palea keels ciliate. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3; 1 mm long; ciliate. Anthers 3. Stigmas 2–3; plumose. Ovary glabrous.

DISTRIBUTION Asia-temperate: China.

NOTES Arundinarieae. Wen 2014.

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