Hosta montana Shunko Nishiki New Guinea Iris lazica is a close

Iris lazica is a close relative of the better known Iris unguicularis

Thad used this for many of his great hybrids that would follow

Though it might be worth mentioning that there are 70-some wild species and a few occur in wet sites

this may be the closest you'll ever get

then you've missed one of the best blue-flowered members of the genus Baptisia

Hosta montana Shunko Nishiki New Guinea Iris lazica is a closeThis beautiful sport of the large growing Hosta montana was discovered by Japanese nurseryman Hiroyoshi Watanabe. It superficially resembles H. 'On Stage' (Choko Nishiki) with long, pointed leaves featuring a brilliant white center and contrasting medium green border. Each 3'+ clump (we don't know a mature size, since most Japanese grown plants are kept in tiny little pots) is topped with stalks of light lavender flowers on 48" scapes.