This second one is called Iris cristata 'Blue Giant' and though the 'giant' is relative, it is bigger than the normal cristata blooms. I love the pattern of the colors and the icy blue. You will occasionally find a white one. They will all get planted out in the spring, once the frosts are past (and once this stupid snow finally melts).
These irises will grow in zones 3-9 and are native to the northeastern US. In general they are about 6 inches tall and bloom in the spring. The color ranges through the blues and lavenders for the most part, though you will find some with a bit more patterning than others. They like full sun to part shade, though here they seem to grow best in part shade, especially if you want the flowers to look their best. If grown in full sun, you need to be sure they are getting enough moisture. In the wild I often have seen them growing at the edge of the woods. They will naturalize in a place where they are happy. They're nice in a rock garden or woodland garden. The only problem, and if can be a big one, is snails and slugs. Suround them with a coarse grit mulch - like chicken grit from the feed store - to discourage those slimy pests.
They are listed as an endangered species in Pennsylvania and Maryland, and because they are notoriously difficult to transplant in any case, and very inexpensive, I would recommend just buying an assortment from an iris nursery.