Sinosasa gracilis A habit B foliage leafy branch C culm bud and strongly raised supranodal ridge D culm leaf sheath base E partial culm, showing solitary branch F dried foliage leafy branch, showing wavy blades and a close-up view of glabrous sheath, short inner ligules, auricles and oral setae G culm leaf blade, auricles and oral setae H glabrous abaxial surface of culm leaf sheath. All photos by Xing Li.