Kendall County (IL) Forest Preserve District

Flower-of-an-Hour
Hibiscus trionum
Mallow family (Malvaceae
)
Blooms Mid-August - September

The non-native (European) Flower-of-an-Hour is common in our area, preferring full sunlight and average moisture. It is a summer annual that develops into a sprawling vine up to 1' tall with stems up to 2' in length, branching occasionally, round and hairy. The alternate leaves are up to 3" long and 2" across and deeply divided into 3 primary lobes. From the axils of the leaves, there develops single flowers from hairy stalks. Each flower is about 2" across, consisting of 5 rounded white petals that are purple at the base. Each flower blooms during a single day that is sunny, and remains open for only a few hours.

Flower-of-an-Hour along Minkler Road August 26, 2013

Flower-of-an-Hour foliage along Minkler Road August 26, 2013

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