Shen Collection, Upper Volume Radical: Grass (cǎo) 薞 Kangxi stroke count: 19 Page 1061, Entry 28 Pronounced sun (level tone) Erya, Explanation of Plants (Erya Shicao): Regarding the plant called huai, it is also known as wu-sun. Also: Xu, sun-wu. Commentary: Sun-wu resembles the dock plant (rumex); its leaves are slender and its flavor is sour, making it edible. Collection of Characters (Pianhai): Also written in a variant form. Textual research: In the Erya, Explanation of Plants (Erya Shicao), it is written as huai, known as wu-sun. According to the original text, huai has been corrected to huai.