Morning Glory Seed original: "牽牛子"

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Illustrations for the Compendium of Materia Medica

A botanical woodblock-style illustration of a morning glory vine (Pharbitis nil). The drawing shows a central climbing stem with several cordate (heart-shaped) leaves and winding tendrils. Two large, open trumpet-shaped flowers are prominent, along with several smaller ovoid flower buds at various stages of development.