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秆直立,高达9米,直径达4.8厘米,竹材厚约11毫米,节间圆柱形,最下部节间全部无毛,嫩时具显著的紫色条纹和紫色斑点。秆箨脱落性;背面被紧贴的黑褐色刺毛,嫩时具紫色斑纹,顶端弓形下凹;箨耳近扇形或狭长圆形;箨舌高约3.2毫米,边缘具长而基部粗糙的流苏状毛,箨片常外反,卵状披针形,基部截形,近基部边缘具长纤毛,秆枝簇生,主枝长而粗,小枝通常具叶5～8枚;叶耳卵形;叶舌高约0.5毫米;叶片披针形或长圆状披针形,长5～12厘米,宽6～19毫米,背面密被短柔毛,次脉4～5对。假小穗紫色或淡
Culms upright, up to 9 meters, diameter up to 4.8 cm, bamboo thickness of about 11 mm, internode cylindrical, all lowermost internodes glabrous, tender with significant purple stripes and purple spots. Culms detached; abaxially black-brown bristles adherent, tender purple with stripes, apically sagittal; 箨 ears nearly fan-shaped or narrowly oblong; rachilla ca. 3.2 mm, margin long and basally coarse tassels Ovary lanceolate, truncate at base, ciliate at proximal margin, fascicled from culm, main branches long and thick, branchlets usually with leaves 5 to 8; leaf ears ovate; Leaf ligule ca. 0.5 mm; leaf blade lanceolate or oblong-lanceolate, 5-12 cm long, 6-19 mm wide, abaxially densely pubescent, 4-5 pairs of secondary veins. False spikelets purple or pale