Noun | 1. | compass flower - any of several plants having leaves so arranged on the axis as to indicate the cardinal points of the compass 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 composite plant, composite - considered the most highly evolved dicotyledonous plants, characterized by florets arranged in dense heads that resemble single flowers horse thistle, Lactuca scariola, Lactuca serriola, prickly lettuce - European annual wild lettuce having prickly stems; a troublesome weed in parts of United States rosinweed, Silphium laciniatum - North American perennial having a resinous odor and yellow flowers |