Identification: Grasses at Seattle Public Library

I am trying to identify these ornamental grasses from the Seattle Public Library. I have attached photos from my recent (early sept) visit.

grass 1: wide flat (almost fleshy) blades, slight variegation at margins, not flowering
grass 2: narrow and thin blades, soft edges, lies flat in many areas, spike inflorescent
grass 3: thin blades with very sharp edges, floppy, not in flower (in foreground of photo- not black mondo grass)

Thanks!

 

Grass 3 looks like Cortaderia of some sort - inflorescences will help that ID immensely.

 

Thanks for the reply. I agree it looks like some kind of cortaderia, but I took that photo a couple of weeks ago and there wasn't a single inflorescent of dried seed head. I have attached a few more photos for scale and growth habit.

The edges of the blades are very sharp. it is sort of floppy/flat and had zero evidence of flower or seed head. Maybe pennisetum velosum?

I believe I have identified the first two:

grass 1 Carex morrowii
grass 2 Sesleria autumnalis

 

Maybe. Consciencious landscapers in your area are normally quite vigilant about deadheading Cortaderia, simply because if they don't it can go invasive very very quickly. Personally, I grow it for the seed heads. Then again, I also live within its native range.

 

I see no Cortaderia in these pictures. The one with the black mondo grass might be a sedge. Have you asked at the library if they have any information about the design?