1. Calyx ca. 7–9 mm long, glandular-pubescent (as are the stem and pedicels); plant ± spreading.
1. Calyx (16–) 18–21 (–23) mm long, glabrous and eglandular (as is the rest of the plant); plant erect.
All species found in Saponaria
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. April 20, 2019. https://michiganflora.net/genus.aspx?id=Saponaria.