Noun: flower-of-an-hour
- Annual weedy herb with ephemeral yellow purple-eyed flowers
"The flower-of-an-hour blooms only briefly each day";
- flowers-of-an-hour, bladder ketmia, black-eyed Susan, Hibiscus trionum
Derived forms: flower-of-an-hours
Type of: hibiscus
Encyclopedia: Flower-of-an-hour