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Entry 1 sense Webster, 1913

flowers-of-an-hour

· IPA
01 n. An annual weedy herb (Hibiscus trionum) with ephemeral yellow purple-eyed flowers, native to the Old World tropics and naturalized as a wee…
  1. 1.
    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.