It is important to note the Latin name of the skullcap being used as over 200 varieties exist, some used for various ailments, each with varying degrees of effectiveness. Sometimes, Scutellaria lateriflora (North American skullcap) is mistaken for S. baicalensis. This confusion can result in the intake of the S. lateriflora variety which is often processed and contaminated with other plants with high enough levels of toxicity to be of concern.
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^Isolation and purification of baicalein, wogonin and oroxylin A from the medicinal plant Scutellaria baicalensis by high-speed counter-current chromatography. Hua-Bin Li and Feng Chen, Journal of Chromatography A, 13 May 2005, Volume 1074, Issues 1–2, pages 107–110, doi:10.1016/j.chroma.2005.03.088
^Yang LX, Liu D, Feng XF, Cui SL, Yang JY, Tang XJ et al. (2002). "[Determination of flavone for Scutellaria baicalensis from different areas by HPLC]". Zhongguo Zhong Yao Za Zhi (in Chinese) 27 (3): 166–70. PMID12774393.