Fruit morphology may vary on different individuals of the same species, depending on relative shape and size of the fertile locule and the 2 sterile locules.
1. Bracts of inflorescence at least partly ciliate; fruit bearing a corky mass of nearly equal size; corolla lobes blue.
1. Bracts completely lacking cilia; fruit without such a mass; corolla lobes white.
2. Fruit 2.7–4 (–4.2) mm long; stems glabrous (except sometimes at nodes) and leaves glabrous (except sometimes toward base).
2. Fruit ca. 1.5–2 mm long; stems pubescent on angles and leaf margins ciliate (sometimes glabrate with age).
All species found in Valerianella
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 13, 2017. http://www.michiganflora.net/genus.aspx?id=Valerianella.