unfortunately I can't make much of that last aloe... could be an aloe vera-like species, or some hybrid. Not a recognizable species, though. First one definitely is A humilis. Second one sure looks like an Echinopsis hybrid to me (but I am no cactus expert)
palmbob, thanks for the IDs. I see that you're spot on for the A. humilis, and probably for the cactus. The bottom aloe was sold as "red". Very descriptive when so few aloes are red-flowered. :-D I guess I'll wait and see after it grows awhile.
Okay, now I feel like a fool. The green aloe came with a identification stake in it. It said "aloe red. cynthia giddy". We thought that meant the seller as it was a benefit sale for a technical school. I finally thought to Google it. Imagine my surprise on finding that it was the name of the aloe. Duh! Learning is a wonderful, if humbling, thing.
I couldn't tell you if that's what it is, but you'll know soon enough. "Cynthia Giddy" is a nice plant, goes through seasonal changes in color, flowers 3 or 4 times a year. I think the "red" part of it probably refers more to the leaves than the flowers. These photos of the same plant in day-long sun were taken in January (our rainy season), May, July (our dry season), and October. They are not in chronological order.
I wouldn't recommend growing a young plant like yours in lots of sun, but once they reach a certain size/age they seem to really thrive in it (here).
An hour or two of morning sun ought to be sufficient for starters, maybe some kind of dappled light while the plant is adjusting. Phoenix sun is a more serious force to reckon with than the cooler version we have here.
The Cactus is positively an Echinopsis. If the flower is all white then the odds are very high that it's a species. If the flower is not white, then it's highly likely a hybrid and then 'Good Luck' on finding the cultivar. Has it bloomed?
Xeno, I just got it Saturday. A friend picked it up at the Metro Tech sale. We were not being especially choosy. She was there, on the phone, and I was at home. She told me the shape of the cactus and the price and I said "Get it." That was the extent of our knowledge. :-) Now I'm trying to figure out the best exposure for it. What is your advice? You know where I live.