trifolium

noun

1. Any of the genus Trifolium of clovers and trefoils.

   “The larger species (Panax quinquefolium) is rather coarse and ordinary in its appearance; the flowers are very nearly like those of the trifolia, but grow in an irregular and elongated cluster.”

   “The majority of the trifoliums are native to Europe and Asia. Only comparatively few of the trifoliums native to the United States are of food production significance.”