rainbow shower(n = noun.plant) cassia javonica - deciduous ornamental hybrid of southeastern Asia and Hawaii having racemes of flowers ranging in color from cream-colored to orange and red;
is a kind of cassia

golden shower tree, meteor shower, pink shower, pink shower tree, rain shower, rainbow, rainbow cactus, rainbow fish, rainbow lorikeet, rainbow perch, rainbow pink, rainbow runner, rainbow seaperch, rainbow smelt, rainbow trout, shower, shower bath, shower cap, shower curtain, shower down, shower room, shower stall