This is a very difficult genus taxonomically, the species very similar to each other and often not easily recognizable, especially when individuals are small or immature.

The corollas are white or pale blue-purple, with darker purple lines and a bright yellow spot at the base of the lower lip.

1. Calyx, bracts, and leaves glabrous or at most scabrous on some nerves; calyx lobes and leaf teeth tapered into prolonged bristle tips.

E. stricta

1. Calyx, bracts, and leaves pubescent; calyx lobes acute to somewhat bristle-tipped.

2. Cauline leaves (not subtending flowers) strongly cuneate at base, the teeth acute to blunt; calyx pubescent principally on the nerves and lobes; plants sometimes flowering as low as the second node.

E. hudsoniana

2. Cauline leaves broadly cuneate to rounded at base, the teeth rounded to blunt; calyx rather densely hairy throughout; plants flowering only as low as the fifth node.

E. nemorosa

All species found in Euphrasia

Euphrasia hudsonianaEYEBRIGHT 
Euphrasia nemorosaEYEBRIGHT 
Euphrasia strictaEUROPEAN EYEBRIGHT 


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. March 18, 2018.