Saxifraga

1. Margins of basal leaves with crowded teeth and white lime-encrusted pores.

S. paniculata

1. Margins of basal leaves entire except for (2–) 3 prominent spine-tipped apical teeth.

S. tricuspidata

All species found in Saxifraga

Saxifraga paniculataLIME-ENCRUSTED SAXIFRAGE 
Saxifraga tricuspidataPRICKLY SAXIFRAGE 

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. March 27, 2017. http://michiganflora.net/genus.aspx?id=Saxifraga.