Saponaria

1. Calyx ca. 7–9 mm long, glandular-pubescent (as are the stem and pedicels); plant ± spreading.

S. ocymoides

1. Calyx (16–) 18–21 (–23) mm long, glabrous and eglandular (as is the rest of the plant); plant erect.

S. officinalis

All species found in Saponaria

Saponaria ocymoidesSAPONARIA 
Saponaria officinalisBOUNCING BET, SOAPWORT 

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=Saponaria.