Sida

1. Calyx divided less than halfway, with a terete base; petals white; leaf blades deeply palmately lobed; carpels (8–) 10.

S. hermaphrodita

1. Calyx divided more than halfway, with an angled base; petals yellow; leaf blades ovate-elliptic to oblong, not lobed; carpels ca. 5.

S. spinosa

All species found in Sida

Sida hermaphroditaSIDA 
Sida spinosaPRICKLY SIDA 

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. October 17, 2017. http://michiganflora.net/genus.aspx?id=Sida.