| Noun | 1. | genus Ayapana - genus of tropical American herbs sometimes included in genus Eupatorium rosid dicot genus - a genus of dicotyledonous plants aster family, Asteraceae, Compositae, family Asteraceae, family Compositae - plants with heads composed of many florets: aster; daisy; dandelion; goldenrod; marigold; lettuces; ragweed; sunflower; thistle; zinnia ayapana, Ayapana triplinervis, Eupatorium aya-pana - low spreading tropical American shrub with long slender leaves used to make a mildly stimulating drink resembling tea; sometimes placed in genus Eupatorium |