(Da qing; Qiug dai) Contains indican and isatin B, both of which can be converted to indigo. Considered antibacterial, antiviral, and anti-inflammatory. Leaves and roots are effective against flu, encephalitis, measles, hepatitis, and mumps.
NOTE!
Chinese Woad (Isatis tinctoria)
Da Qing. Qiug Dai. Used in Chinese medicine as an antiseptic gargle and as an anti-inflammatory to irritated liver and spleen. The plant is considered anti-bacterial and ant-viral. Leaves and roots have been used for flu, measles, hepatitis, and mumps. Both varieties have been used historically as a source of blue dye prior to the introduction of Indigo. Easy to grow perennial with leathery blue-green leaves sending up stems with delicate yellow flowers. Considered a noxious weed in CA, OR and WA. Hardy to zone 3.
