ask PHS

 I was all set to get back to you to tell you we no longer had that information, but after some sleuthing, I found out what seeds were in the seed balls:

Seeds in the mix are as follows: red milkweed, common milkweed, butterfly weed, New England aster, partridge pea, plains coreopsis, purple coneflower, rattlesnake master, wild cosmos, Black-eyed Susan, evening primrose, brown-eyed Susan, goldenrod, blazing star, eastern red Columbine, wild bergamot, Indian blanket, Scarlett sage, wild lupine, purple prairie clover, rose mallow, lemon mint, baby’s breath and Joe pye weed.

You shouldn't have any problems finding images of these plants online, if you don't know what they look like.

Hope this helps!