Authentic Wisconsin.  Wild Petunia - Ruellia humilis


Wild Petunia off of Bike Path behind Gregory Street in Madison, Wisconsin on June 28, 2021.


Above: Wild Petunia off of Bike Path behind Gregory Street in Madison, Wisconsin (6/28/21).


Wild Petunia - Ruellia humilis   (Special Concern/Endangered)

Wild Petunia grows from 3"-24" tall. The funnel-shaped lavender flowers are 5-lobed and the flower tube is contracted one third to halfway down its length and becomes very slender, pale greenish and stalk-like.

Blooms late May through early October.

NOTE: Ruellia humilis is designated as a special concern species and is listed as Endangered in Wisconsin. Wild Petunia is increasingly available in the native plant trade and does well in cultivation.

Other names: Hairy Wild Petunia, Fringe-leaf ruellia, Hairy ruellia.

For more information on the Wild Petunia, visit Wikipedia.

Or, visit the UW-Madison Wisconsin Herbarium online virtual flora website page on Wild Petunia.

Or, visit the Wisconsin DNR website page about Hairy Wild Petunia (Ruellia humilis).


Wild Petunia off of Bike Path behind Gregory Street in Madison, Wisconsin on June 28, 2021.
Wild Petunia off of Bike Path behind Gregory Street in Madison, Wisconsin on June 28, 2021.
Wild Petunia off of Bike Path behind Gregory Street in Madison, Wisconsin on June 28, 2021.
Wild Petunia in UW Arboretum Native Gardens in Madison, Wisconsin on June 30, 2021.
Wild Petunia in UW Arboretum Native Gardens in Madison, Wisconsin on June 30, 2021.
Wild Petunia in UW Arboretum Native Gardens in Madison, Wisconsin on June 30, 2021.
Wild Petunia in UW Arboretum Native Gardens in Madison, Wisconsin on June 30, 2021.
Wild Petunia in UW Arboretum Native Gardens in Madison, Wisconsin on June 30, 2021.
Wild Petunia in UW Arboretum Native Gardens in Madison, Wisconsin on June 30, 2021.
Wild Petunia in UW Arboretum Native Gardens in Madison, Wisconsin on June 30, 2021.
Wild Petunia in UW Arboretum Native Gardens in Madison, Wisconsin on June 30, 2021.
Wild Petunia in UW Arboretum Native Gardens in Madison, Wisconsin on June 30, 2021.
Wild Petunia in UW Arboretum Native Gardens in Madison, Wisconsin on June 30, 2021.
Wild Petunia in UW Arboretum Native Gardens in Madison, Wisconsin on June 30, 2021.
Wild Petunia in UW Arboretum Native Gardens in Madison, Wisconsin on June 30, 2021.
Wild Petunia in UW Arboretum Native Gardens in Madison, Wisconsin on July 16, 2021.
Wild Petunia in UW Arboretum Native Gardens in Madison, Wisconsin on July 16, 2021.
Wild Petunia in UW Arboretum Native Gardens in Madison, Wisconsin on July 30, 2021.

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Wisconsin Wildflowers


Wild Petunia
Ruellia humilis


Wild Petunia off of Bike Path behind Gregory Street in Madison, Wisconsin on June 28, 2021.

Wild Petunia off of Bike Path behind Gregory Street in Madison, Wisconsin on June 28, 2021.


Above: Wild Petunia off of Bike Path behind Gregory Street in Madison, Wisconsin (6/28/21). Note: The flower tube is contracted one third to halfway down its length and becomes very slender, pale greenish and stalk-like.


Wild Petunia in UW Arboretum Native Gardens in Madison, Wisconsin on June 30, 2021.


Above: Wild Petunia off of Bike Path behind Gregory Street in Madison, Wisconsin (6/30/21).


Wild Petunia in UW Arboretum Native Gardens in Madison, Wisconsin on July 31, 2021.


Above: Wild Petunia off of Bike Path behind Gregory Street in Madison, Wisconsin (7/31/21).


Wild Petunia in UW Arboretum Native Gardens in Madison, Wisconsin on August 2, 2021.


Above: Wild Petunia in UW Arboretum Native Gardens in Madison, Wisconsin (8/02/21).


Wild Petunia (Ruellia humilis) specimen collected in Grant County on September 4, 1997.


Above: Wild Petunia (Ruellia humilis) specimen collected in Grant County on September 4, 1997. NOTE: Precise location is blocked out because Ruellia humilis is an endangered species.



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