There is an image of this cultivar on the Hosta Library. From the photo on the HL website, it appears to be a very upright growing, large size hosta with light green foliage that is piecrust shaped and has deep veins. The leaves are slightly corrugated and come to a point at the tip. 'Dirigo' bears white flowers. This non-registered cultivar was originated by Rick Sawyer of Maine. 

Dirigo is a Latin word that means "I lead" and is found in the state seal of Maine.