This plant - Echeveria tranthina - has a very unusual color and it's identification has often been uncertain. The type locality is the Barranca de Tolantongo in the Mexican state of Hidalgo.
This is the first warm night of the year - mid 50sF - which I understand is all very relative. But we're used to cool nights, even in the middle of the summer. But it's going to be warm for the holiday weekend (Independence Day in the U.S.), with highs in the low 80s F. OK, you people in Tucson and Phoenix, stop laughing!