If you are talking about the solid green hosta on the left, I think it is Lancifolia. Here is what the website says about it...I've placed the link below so you can see for yourself.

Char
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The Green One that Grows Like a Fountain (or Grass): 'Lancifolia'

Very common as an edging plant. Makes a mound to 2' across, with arching, lance-shaped leaves (10" x 2") that are spotted with reddish-brown on their stems (petioles). The flower scapes are tall lavender blooms. Like Undulata, this one is sterile (no seed pods) and so increases by making bigger clumps.

Here is a link that might be useful: Guide to identifying Undulatas

Looks like Lancifolia to me as well... if it's the first to come up in the spring and one of the last to bloom, you know you have the right plant.