There are so many look alike hostas and people let them drop seeds to create seedlings (which have no identity), it can be difficult to ID without choosing from a list you know you have.
That being said, my guess would be Ginko Craig. It is fairly accessible and has even been at big box stores. Verify the plant height, leaf size, count the veins in the leaf, color of bloom, fragrance. See site below.
Plant 6-10 " veins 9 etc
http://www.myhostas.com/show/1...
