Chen Collection, Middle Volume Radical: Tree (mù) 槸 Kangxi strokes: 15 Page 548, Entry 05 Pronounced yì. Book of Rites (Erya), Explanation of Trees: Trees rubbing against each other is called yi. Commentary by Guo Pu: Tree branches rubbing against one another. Sometimes also written in a variant form using the grass radical. Also the same as the character yi. See the detailed entry for the character yi.