Noun | 1. | ![]() asterid dicot genus - genus of more or less advanced dicotyledonous herbs and some trees and shrubs Diervilla lonicera, bush honeysuckle - spreading bush of northeastern United States having small clusters of fragrant green and yellow flowers Diervilla sessilifolia, bush honeysuckle - bush honeysuckle of southeastern United States having large crowded clusters of sulfur-yellow flowers |