I bought these cacti at Plants for the Southwest, a nursery about 2.5 miles from where I live. The multiflowered one is Mammillaria saboae, a native of Chihuahua.
This one is Turbinicarpus pseudomacrochele, from central Mexico. The third cactus in the pot is Thelocactus hexaedrophorus and I'll post a photo when its flowers open (probably next week). I also bought an Aloe humilis and the bromeliad Dykia (a hybrid). Maybe I'll post photos when they grow up.