Culms 5–10 m, 3–7 cm in diam.; internodes to 35 cm, initially white powdery below nodes, glabrous; wall ca. 3 mm thick; nodal ridge elevated, as prominent as sheath scar or slightly more so; sheath scar purple-tinted, initially white pubescent. Culm sheaths brown-purple, dark green, or yellow-brown, sometimes striped with purple, distally with dense variably sized dark brown spots, proximally with sparser, smaller ones, white powdery, fringed with white pubescence at base; auricles and oral setae absent; ligule yellow-green to yellow-brown, arcuate with a central hump, moderately long, margin ciliolate; blade reflexed, purple-green, with yellow margins, narrowly linear, ± undulate to weakly crinkled. Leaves 2 or 3 per ultimate branch; sheaths glabrous; auricles and oral setae usually absent; ligule evidently exserted; blade lanceolate to linear-lanceolate 7–13 × 1–2 cm. Flowering branchlets spicate, 5.5–7 cm, basal bracts 2–4, gradually larger; spathes 5–8, glabrous or hairy on one side, without auricles and oral setae; blade ovate-lanceolate to subulate, small. Pseudospikelets 1–3 per spathe. Spikelets lanceolate, 3–3.5 cm; florets 1 or 2; rachilla pubescent, terminally extended beyond uppermost floret. Glumes 1, lanceolate; lemma 2–2.5 cm, glabrous, apex acuminate with a subulate point; palea ca. 2 cm, subglabrous or apically puberulent; lodicules oblong-lanceolate, ca. 2.5 mm. Anthers 1–1.2 cm. Stigmas 3. New shoots Apr, fl. Apr–May.
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A bamboo. It grows 5-10 m tall. The stems are 3-7 cm wide. The internodes are 35 cm long. There are 2 or 3 leaves on the last branch. The leaf blade is 7-13 cm long by 1-2 cm wide.