Natural indigo extracted from the leaf and stem of Strobilanthes Cusia has been used as traditional Chinese medicine, named qing dai (QD) or nanbanlangen to treat dental ulcers, ulcerative colitis and psoriasis due to its anti-virus, anti-inflammatory, and anti-leukemia activities.

Scientific classitication

Family: Acanthaceae

Genus: Strobilanthes

Common Name

Nan Ban Lan Gen


Xu, W., Zhang, L., Cunningham, A. B., Li, S., Zhuang, H., Wang, Y., & Liu, A. (2020). Blue genome: chromosome-scale genome reveals the evolutionary and molecular basis of indigo biosynthesis in Strobilanthes cusia. The Plant journal : for cell and molecular biology, 104(4), 864–879.