The heartwood of a tree (Hæmatoxylon Campechianum), a native of South America, It is a red, heavy wood, containing a crystalline substance called hæmatoxylin, and is used largely in dyeing. An extract from this wood is used in medicine as an astringent. Also called Campeachy wood, and bloodwood.

very hard brown to brownish-red heartwood of a logwood tree; used in preparing a purplish red dye

spiny shrub or small tree of Central America and West Indies having bipinnate leaves and racemes of small bright yellow flowers and yielding a hard brown or brownish-red heartwood used in preparing a black dye

Justicia gendarussa, an aromatic Asian shrub. It is also called Daun Rusa, Gander Rusa, Jagatmadan, and Nila-Nirgundi or Nili-Nargandi.