| 1 | Culm sheath auricles falcate, long. Leaf blade abaxially minutely pubescent along one or both sides of midrib. | |
| 2 | Liquid preservatives were used to store winter bamboo-shoots with sheaths. | |
| 3 | Culm sheaths thin; glumes and lemma densely glaucous, sparsely puberulous or nearly glabrous. | |
| 4 | Culm sheath asymmetrical, one side smooth, the other rugate , apex with unequal rounded shoulders. | |
| 5 | Branches arising from basal 3rd or 4th node up; larger auricle of culm sheath oblong, not tapering. |