Trillium cuneatum and T. virvidescens are blooming. I'm happy to see multiple ones that flowered last year have produce another one this year equally strong.
[Added Later] It turns out I have two species of Trillium pictured here. T. cuneatum has full red petals and doesn't produce any odor. Trillium virvidescens has the half green petals and is producing a rotten apple-like fragrance to attract the flies.
Trilliums are probably the best example of plants that disperse their seeds with ants. I'll have more on that later in the year.