Bloodletting.
The flow or loss of blood from a damaged blood vessel.
used as an intensifier: Extremely.
Losing blood
extreme, outright; see also bloody (sense 3).
The plant bloodroot, Sanguinaria canadensis.
Rumex sanguineus, bloody dock, wood dock, bloody-veined dock.
Sanguinary, common yarrow, Achillea millefolium.
Capsella bursa-pastoris, shepherd's purse.
Any of the Haemodoraceae, a family of flowering plants some of whose roots contain a red dye.
Various species in the genus Sanguisorba, burnet.