The Collaborative International Dictionary
flowers-of-an-hour
flowers-of-an-hour \flowers-of-an-hour\ n. An annual weedy herb ( Hibiscus trionum) with ephemeral yellow purple-eyed flowers, native to the Old World tropics and naturalized as a weed in North America.
Syn: flower-of-an-hour, bladder ketmia, black-eyed Susan, Hibiscus trionum.
WordNet
flowers-of-an-hour
n. annual weedy herb with ephemeral yellow purple-eyed flowers; Old World tropics; naturalized as a weed in North America [syn: flower-of-an-hour, bladder ketmia, black-eyed Susan, Hibiscus trionum]