Siegesbeckia orientalis Identity & Plant Part
The botanical entity is Siegesbeckia orientalis L., an annual herb of the Asteraceae with yellow ray flowers and glandular, sticky hairs on the upper stem. The part used is the aerial portion, meaning leaf, stem and flower head. Roots are not part of this ingredient. The genus name also appears as Sigesbeckia in older and alternative spellings.
Chinese xi xian cao is traditionally drawn from three Siegesbeckia species, so supplier lists may mix S. orientalis with S. pubescens and S. glabrescens. The species is fixed here to Siegesbeckia orientalis. The herb carries diterpenes, sesquiterpene lactones, flavonoids and phenolic acids, named as families only.












