This plant has been confused, by many authors, with Iris versicolor L. which has a more northern range. I. versicolor has been found in the extreme northwestern part of Ohio and should be sought in our northern counties and it is for this reason that it appears in the key. I. virginica var. shrevei is more or less frequent throughout the state along ditches, banks of streams, the borders of lakes, ponds, sloughs, and in low places in general. Nieuwland (Amer. Midland Nat. 3: 115. 1913) described a variety of I. versicolor which he called var. blandescens and which, no doubt, should be referred to some form of this species.
