Hi Kay,

I'm trying to get in contact with someone at Beal Botanical Garden to get you an ID. I will email you as soon as I hear back from them. 

Thank you for your patience. 

Lindsey K. Kerr, MS, MHP (she, her, hers)
Consumer Horticulture Educator
Michigan State University Extension

Hi Kay,

Since we haven't heard back from Beal yet, I can offer my 2 cents. It's a little hard for me to tell if these are more of a true green color or if they are chartreuse. If they are more of a true green color, they look like they could simply be 'Royal Standard'. The flower timing would be right for that variety and I don't know if you got a chance to smell them, but the flowers would have a nice fragrance if it's 'Royal Standard'. It's also one that tolerates more full sun, which it looks like these are in. UGA's cultural sheet lists some common varieties and their characteristics here. I've also included a factsheet from Arkansas, but I don't think their picture does the plant justice, there's some good historical information there though.

https://extension.uga.edu/publications/detail.html?number=C955&title=growing-hostas

https://www.uaex.uada.edu/yard-garden/resource-library/plant-week/royal-standard-hosta.aspx

If they are in fact chartreuse in color, that's a bit more of a mystery to me as I'm not aware of many that would have a white flower rather than purple.

I hope that helps!