苦楝
In Mexico, for example, farmers will use almost exclusively leguminous trees (species of "Inga") to provide shade for coffee bushes. In south-east Asia, suitable trees include "Erythrina subumbrans" (tton tong or dadap), "Gliricidia sepium" (khae falang), "Cassia siamea" (khi lek), "Melia azedarach" (khao dao sang, Indian lilac), and "Paulownia tomentosa", a useful timber tree.