1. Corolla irregular, with a white petal distinctly smaller than the 2 blue ones; inflorescence subtended by a broad folded bract or spathe less than 3 cm long.
1. Corolla regular, the petals of the same size and color; inflorescence subtended by narrow bracts 4–20 cm long, resembling the leaves.
All species found in Commelinaceae
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. October 18, 2017. http://michiganflora.net/family.aspx?id=Commelinaceae.