Peggy Lee is just about to deliver some endangered sunflowers to Darmus Appleby when a gas explosion blows out his door--and Peggy finds her fellow botanist dead on the kitchen floor. And it's only two weeks later when Darmus's brother dies, after being found unconscious in a community garden with his brother's wedding ring in one hand and--in his pocket--a lovely purple Hyacinth with an overpowering scent.   Now Peggy must follow her nose--and some cryptic clues from an internet informant--to root out a killer before he strikes again.   Gardening tips included!