[The relationship between the quality and the leaf shape of Magnolia officinalis produced in Hubei enshi].

OBJECTIVE: To reveal the relationship between the quality and the leaf shape of Magnolia officinalis produced in Hubei Enshi. METHODS: Determined the content of magnolol and honokiol by HPLC with methanol-water (78:22) and the detective wavelength was 294 nm. RESULTS: The content of magnolol and honokiol in the leaf of Magnolia officinalis was usually higher if the leaf apex was convex and the leaves were short. In certain years, the content of magnolol and honokiol in Cortex Magnoliae officinalis was positively correlated with the bark thickness. CONCLUSION: The leaf shape of Magnolia officinalis produced in Hubei Enshi is directly related to the phenolic content of leaf itself. But it has nothing to do with the content of magnolol and honokiol in Cortex Magnoliae officinalis.