Here is a photo of I alexeenkoi, which grows in the
steppes of eastern Russia. It is a tetraploid, having a chromosome count
of 32, and blooms here at 8 inches tall. Brian Mathew claims that its
larger leaves and larger flowers are the only characteristics that distinguish
it from I. pumila. Mathew also states that when he grew it, it
succumbed to a virus. Köhlein says it "grows poorly in cooler
climates." I find it to be healthy, and it survives to 0 degrees F.