秆高9米,直径7厘米许,节间长达38厘米,绿色无毛,秆环不明显,箨环隆起,基部节有时呈不规则靠近或重叠。箨鞘革质,近矩形、绿色、被脱落性稀疏褐色刺毛,基部较密,边缘无毛,先端不收缩,两边不均齐;箨舌隆起,高5毫米,先端边缘齿状,具短繸毛;假箨耳椭圆形与箨片、箨鞘相连接,棕褐色、粗糙、皱摺,边缘有长3—6毫米稀疏繸毛;箨片三角形,直立,基部收缩,先端渐尖,具纵脉、无毛、基部边缘有繸毛。小枝多较簇 Culms 9 meters high, diameter 7 cm Xu, internals up to 38 cm, green glabrous, stalk ring is not obvious, 箨 ring uplift, basal section sometimes irregular or overlapping.箨 sheath leathery, nearly rectangular, green, sparsely brown hair bristles abscission, base more dense, margin glabrous, apex not constricted, uneven on both sides; 箨 tongue raised, 5 mm high, apex marginal toothed, with short繸;; fake 箨 ear oval and cymbidium, sheath sheath connected, brown, rough, wrinkled, margin 3-6 mm long sparsely hairy; Ephemeral triangle, erect, base contracted, apex acuminate, with a Longitudinal veins, glabrous, abaxially pubescent at base margin. Branchlets more clusters