hæmatoxylon

from The Century Dictionary.

• noun A genus of plants described by Linnæus in 1753, belonging to the natural order Leguminosæ, suborder Cæsalpinieæ, of which only one species, H. Campechianum, the logwood-tree, is known; it is a native of Central America and the West Indies, and is important as furnishing the logwood of commerce.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Bot.) A genus of leguminous plants containing but a single species, the Haematoxylon Campechianum or logwood tree, native in Yucatan.