Polygala lutea po·ly·ga·lalutea uncommon noun 1. bog plant of pine barrens of southeastern United States having spikes of irregular yellow-orange flowers Synonymsorange milkwortyellow milkwortcandyweedyellow bachelor's buttonPolygala lutea Related words Broader terms milkwort WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.