The botanical name Peristrophe roxburghiana was indicated as a synonym of Peristrophe bivalvis in the Plant List website. This was also the case in the Flora of China website. The plant had another botanical name, Peristrophe baphica as reported in a China plant database in 2002 and the name was used in some websites. However, information in the Flora of China (mentioned earlier) published in 2011 had assigned Peristrophe baphica as a synonym of Peristrophe bivalvis. It is therefore quite clear that the accepted name should be Peristrophe bivalvis.
The commonly used Chinese name of this plant 红丝线 is also used to name a different plant known botanically as Lycianthes biflora (family: Solanaceae). Some China websites actually displayed the red berry-like fruits from Lycianthes biflora and the purple flowers from Peristrophe bivalvis in the same page, giving the impression that they were the same plant.