Anchusa

Both of our species are natives of Eurasia, rarely escaped from cultivation.

1. Calyx cleft nearly to the base, the lobes at least 7 mm long and narrowly linear-attenuate.

A. azurea

1. Calyx cleft about half to 2/3 to the base, the lobes ca. 2–5 mm long and narrowly lanceolate to triangular.

A. officinalis

All species found in Anchusa

Anchusa azureaSHOWY BUGLOSS 
Anchusa officinalisCOMMON BUGLOSS 

Citation:

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