Note 2 — Chapter XIX · SHÂ-CHE. LEGEND OF BUDDHA’S DANTA-KÂSHṬHA.
James Legge translation
This was, no doubt, what was called the danta-kâshṭha, or ‘dental wood,’ mostly a bit of the ficus Indicus or banyan tree, which the monk chews every morning to cleanse his teeth, and for the purpose of health generally. The Chinese, not having the banyan, have used, or at least Fâ-hien used, Yang (楊, the general name for the willow) instead of it.