Flora of Pennsylvania

Hibiscus trionum

Hibiscus trionum Venice rosemallow

Plant grows in the wild/spontaneously Add to MyPlants View Locations

Herbaceous annual with deeply lobed leaves and large flowers.

Meadows, fields, roadsides, and other man-disturbed habitats.

Mostly found in the south.

Wetland code: Not classified

Flowers late June to early October.

Jill B (Guest)

Posted on 15 August 2025

-Northwestern Lehigh County.  This plant appeared for the first time along the perimeter of my yard in the beginning of August, 2025, after fill dirt was brought in for a building project. It's a very pretty plant that I've never seen before and was surprised to discover it.

 Posted By Admin: @Jill B Keep in mind that this plant even though pretty, is known for prolific self-seeding. Once established, it can spread far beyond its original planting site, potentially crowding out more delicate or native species in your garden. You may want to keep it in a container.

Cher (Guest)

Posted on 26 July 2025

This plant appeared a few years ago in my flower bed in Bucks County. Have never seen one prior to this.  I have let it remain but am careful to cut off seed pods before they open and disperse to the ground . I still have to pull several out in the spring so it doesn't take over the bed. It is very pretty when the flowers bloom so the maintenance is worth it to me 
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Hibiscus trionum Venice rosemallow

Plant grows in the wild/spontaneously
Add to MyPlants View Locations
Hibiscus trionum gallery
Plant Life-Form
annual or short-lived perennial forb
Common Names
Venice rosemallow flower-of-the-hour