This hibiscus keeps short hours. Although a nickname translates as "wild watermelon seedling," Hibiscus trionum belongs to the mallow family, Malvaceae, and its flowers typically remain open for only a few hours before closing. The resemblance is a distraction. Its English name, flower-of-an-hour, points instead to the fleeting display that makes timing matter more than the label.The brevity conce...More