Coefficient of Conservatism:
Coefficient of Wetness:
B. S. Walters
A favorite, usually deep blue, cultivated Iris from Eurasia, established in moist roadsides and meadows near Cooks, Schoolcraft Co., where first collected by D. Henson in 1996, and sparingly elsewhere.
Older fruiting material of Iris versicolor and I. virginica may appear to have a small hollow in the stem, but unlike these two species, I. sibirica has smooth outer spathe bracts.