Photo: Vincetoxicum atratum 1.

Closeup of flower. Kyoto bot.g, Japan. Planted. 2001-05-04.
Vincetoxicum atratum (Bunge) C. Morr. & Decne. Engl.: swallowwort. TCM: bai wei. Bot. syn.: Cynanchum atratum Bunge
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Photo: Vincetoxicum atratum 1.