Noun | 1. | ![]() asterid dicot genus - genus of more or less advanced dicotyledonous herbs and some trees and shrubs 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 matchbush, matchweed - any of several plants of the genus Gutierrezia having tiny flower heads that resemble the heads of matches broom snakeroot, broom snakeweed, Gutierrezia sarothrae, rabbitweed, rabbit-weed, snakeweed, turpentine weed - low-growing sticky subshrub of southwestern United States having narrow linear leaves on many slender branches and hundreds of tiny yellow flower heads broomweed, broom-weed, Gutierrezia texana - annual of southwestern United States having rigid woody branches with sticky foliage and yellow flowers |