Hibiscus trionum

Noun

1.

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

black-eyed Susan, bladder ketmia, flower-of-an-hour, flowers-of-an-hour, hibiscus