This is a hybrid of an unnamed variegated seedling x H. 'Sum and Substance' was registered by Dr. Dick and Jane Ward of Ohio in 1999. It grows into a large size hosta about 19 inches high with a spread of 48 inches. The green leaves have a white medial (center) variegation. Very pale lavender flowers bloom in July followed by viable seeds.

According to The Hostapedia by Mark Zilis (2009), "The dimensions listed with The American Hosta Society registration...describe a much smaller plant than what I've seen." 

Registration calls for a plant 9 inches high and 18 inches wide.

The New Encyclopedia of Hostas by Diana Grenfell (2009) states: "A good increaser."

Dr. Dick and Jane Ward have named several of their hostas in honor of close relatives. They let me know that, "H. 'Splendid Sarah' is named after our daughter, who is the mother of granddaughters after whom H. 'Kaitlyn' and H. 'Emma are named. H. 'Lauren's Delight' is named after a daughter-in-law, and she is the mother of Alison, of H.' Alison'.  H. 'Magnificent Michelle' is named after a daughter-in-law."