Sanguinary, common yarrow, Achillea millefolium.
Rumex sanguineus, bloody dock, wood dock, bloody-veined dock.
Capsella bursa-pastoris, shepherd's purse.
Any of the Haemodoraceae, a family of flowering plants some of whose roots contain a red dye.
The plant bloodroot, Sanguinaria canadensis.
Various species in the genus Sanguisorba, burnet.
Seutera angustifolia
The greater celandine / tetterwort, Chelidonium majus or Sanguinaria canadensis.
Any of various plants of the genus Asclepias.
The plant Euphorbia maculata (spotted spurge).
Any of several vines of genus Vincetoxicum (syn. Cynanchum), especially black swallow-wort (Vincetoxicum nigrum, syn. Cynanchum nigrum) or white swallowwort (Vincetoxicum hirundinaria, syn. Cynanchum vincetoxicum)
Calotropis gen. et spp.