Hi, I've been given a bunch of succulents by a friend who has a backyard full of them. She doesn't seem to always be sure exactly what they are. Being a biologist, I like to know the exact species of what I have, though I understand some are cultivars, hybrids, or can only be identified if a flower is available. That said, can anyone narrow down what these are??? I appreciate it! There are 3 here (and half of a fourth cactus) An Aloe species, a Gasteria sp., and an Agave sp. The Gasteria is sprouting from a cutting. See attached photos! Tyler Grant