Included in the Capparaceae in Michigan Flora.
1. Petals definitely notched (hence ± 2-lobed) at apex; stamens more than 6; stalk of fruit (not to be confused with long pedicel) very short or absent.
1. Petals not notched or lobed; stamens 6; stalk of fruit very long and slender.
2. Stem glandular-pubescent and with stipular spines; leaflets mostly 5–7.
2. Stem glabrous or nearly so, spineless; leaflets 3.
All species found in Cleomaceae
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. April 25, 2017. http://michiganflora.net/family.aspx?id=Cleomaceae.