This duo — Trillium grandiflorum on the left and T. cuneatum on the right — represent the two main types of trilliums — wake robins and toad shades. Wake robins, such as T. grandiflorum, hold their flowers on stalks above the three leaflike bracts. And the bracts are solid green. The toad shades, represented here by T. cuneatum, have mottled bracts, and the flower rests right on top of them. That’s the first step in identifying an unknown trillium.