WordNet sense 1 (handsome South American shrub or small tree having bright scarlet flowers and yielding a valuable fine-grained yellowish wood; yields the bitter drug quassia from its wood and bark):

quassia, Quassia amara

WordNet sense 2 (West Indian tree yielding the drug Jamaica quassia):

Jamaica quassia, Picrasma excelsa, Picrasma excelsum

WordNet sense 3 (medium to large tree of tropical North and South America having odd-pinnate leaves and long panicles of small pale yellow flowers followed by scarlet fruits):

paradise tree, Simarouba glauca