flowers-of-an-hour

(noun) annual weedy herb with ephemeral yellow purple-eyed flowers; Old World tropics; naturalized as a weed in North America. Synonyms: flower-of-an-hour, bladder ketmia, black-eyed Susan, Hibiscus trionum.

(noun) annual weedy herb with ephemeral yellow purple-eyed flowers; Old World tropics; naturalized as a weed in North America. Synonyms: flower-of-an-hour, bladder ketmia, black-eyed Susan, Hibiscus trionum.