Twenty-two new infrared stars with microwave water-vapor emission have been found, all but four of which are optically identified long-period variables. They are heavily reddened, late M stars that commonly show time variations. Hydroxyl emission is present in all but a few instances. Excited-state SiO emissionon is seen in many H/sub 2/O-infrared stars (although about half have not yet been checked). Those that are Mira variables always have a visual change of more than 6 mag during their light cycle. Other optical and infrared properties are discussed. (AIP)