Napaea dioica L. - Glade Mallow


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Napaea dioica - (image 1 of 5)



Family: Malvaceae


Alluvial soil associated with streams, rivers, and lakes. Somewhat shade tolerant and can be found in moist, open wooded areas.




PA to VA, west to WI and IA.


Herbaceous perennial, to 2 m. Leaves large, rounded, deeply 5-9-lobed; lobes coarsely toothed. Flowers white, borne in a long, terminal panicle; staminate flowers larger than pistillate. Dioeceous.


Flowers late June to July

Wetland indicator: Facultative Wetland -

The only species in the genus Napaea. This plant was photographed at the Schulenberg Prairie, part of the Morton Arboretum in Lisle, IL. It is one of the oldest prairie restorations in the country and one of the largest in the Chicago area.



Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second Ed.
The New York Botanical Garden. Bronx, NY


Swink, F. and G. Wilhelm. 1994. Plants of the Chicago Region.
Indiana Academy of Science. The Morton Arboretum. Lisle, Illinois.


USDA, NRCS. 2002. The PLANTS Database, Version 3.5 (

National Plant Data Center, Baton Rouge, LA 70874-4490 USA.





 Michael Hough 2009