An ethnobotanist who has lived and worked in Central and South America, Balick and co-author Arvigo present 100 traditional herbs of Belize along with the culture and lore surrounding their use in traditional medicine. Each is accompanied by a black-and-white line drawing. Balick is also the author of Plants, People and Culture (AMZ37), an excellent overview of the science of ethnobotany.  (BLZ10, $17.95)