Thank you! Sorry I didn't specify the province, both were photographed in W Sichuan. At that altitude and location I guess it has to be C. repens, the other two are further south. Quite surprised actually, I though C. repens was considered somewhat tender?
I didn't notice any nectar on the white one, the pictures are from late September. Are there any other possibilities? The leaves were mostly ternate, and C. h. var. ternata is from Shaanxi. It might be decidous? The area has warm, moist summers and mild, very dry winters.