A variety of Chinese tea The name was given in the beginning of the 18th cent. to the finest kinds of black tea; but  the quality now known as ‘Bohea’ is the lowest, being the last crop of the season. [OED]. The OED cites "J. R. McCulloch Dict. Commerce 1290   The black teas..beginning with the lowest qualities: Bohea, Congou, Souchong, and Pekoe." 

314