A sport of H. 'Sum and Substance', this cultivar was registered in 1999 by Alex Malloy but was originated by Allen C. Haskell of Massachusetts. Of course, this is a large plant growing up to 25 inches in height and spreading to 5 feet or more. From late July into August, it bears pale lavender flowers.

This was named for the son in the Allen C. Haskell & Son Horticulturists nursery in New Bedford, Massachusetts.

An article by Warren I. Pollock in The Hosta Journal (1996 Vol. 27 No. 2) states that, "I wrote about the exciting new sport of 'Sum and Substance' named 'Lady Isobel Barnett'...The leaves are thick, glossy dark green with an irregular narrow creamy-yellow margin." Pollock went on to identify other 'Sum and Substance' sports with similar leaf colors including H. 'David A. Haskell' and H. 'Sum Total'.