The children and the flowers are my sisters and my brothers. . . in their innocence and trusting they will teach us to be free. . . ."" Cued by the flabby sentimentality of John Denver's innocuous song ""Rhymes and Reasons,"" Randi Gullerud comes up with a ""suite"" of nine static, soft-focus, double-page pictures combining flat, wallpaper-style flowers (and, inevitably, one rainbow) with the faces of children--pensive, rapturous, or whatever. Another vaporous bubble-pipe dream perpetrated in the name of ire Year of the Child.