Moehringia

1. Leaves broadly elliptic, the larger ones nearly oblong-elliptic and mostly rounded at apex, ciliate (and midrib pubescent beneath); sepals ± rounded or obtuse.

M. lateriflora

1. Leaves lanceolate to narrowly elliptic, acute, not ciliate (though margins may be slightly roughened); sepals acute.

M. macrophylla

All species found in Moehringia

Moehringia laterifloraWOOD SANDWORT 
Moehringia macrophyllaBIG-LEAF SANDWORT 

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. August 24, 2019. https://michiganflora.net/genus.aspx?id=Moehringia.