This cultivar of unidentified parentage was registered by Russ O'Harra of Iowa in 1986. The miniature size plant grows to 5 inches in height with a width of around 8 inches. Leaf color ranges from chartreuse to deep yellow with large undulations in texture. It blooms from late June into July.

I seem to remember an article by Warren Pollock in The Hosta Journal that Russ O'Harra used the spelling sulphur because that was how he was taught in his elementary school.