Rotten Island by William Steig (1994)

Recently discovered a William Steig book that had miraculously flown under my Steig-obsessed radar: the 1994 demented masterpiece ROTTEN ISLAND, wherein all the monsters are horrible to each other to the point of ruin, whereupon a flower appears, throwing them further into hysteria. Everyone kills each other and then the island burns up and then it rains and more flowers grow. A raucous delight! Perfect for small big minds!