Primulaceae

1. Corolla pale to deep pink-magenta, yellow, or purple (rarely white), exceeding the calyx; scapes and bracts glabrous or pubescence not stellate; style longer than 1 mm long.

Primula

1. Corolla white, shorter than the calyx; scapes and bracts at base of umbel minutely stellate-pubescent; style minute, less than 0.3 mm long.

Androsace

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. July 26, 2017. http://michiganflora.net/family.aspx?id=Primulaceae.