Cây chàm mèo
Cây mọc hoang ở các thung lũng ẩm ướt, các núi đá và được trồng ở các tỉnh vùng cao ở miền Bắc như Lào Cai, Lai Châu, Sơn La, Hà Giang, Cao Bằng, Lạng Sơn... để lấy cành lá để nhuộm màu vải có màu xanh chàm.
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