Shen Collection, Upper Volume Radical: Grass (cǎo) Tu Kangxi Strokes: 15 Page 1044, Entry 25 Tang Rhyme Dictionary (Tangyun): Pronounced tu. Literary Expositor (Erya), Interpretation of Plants: Tu is another name for the radish. Commentary: The original text should be interpreted as radish. This refers to the radish, which has purple flowers and large roots, colloquially called bao tu. See the detailed note under the entry for radish previously mentioned.