Indian Pear, Prunus pennsylvanica, a small native tree which usually paints the roadsides red and white with its' new leafs and flowers for a few weeks starting on the Victoria Day Weekend. But two weeks early this year. Its' flowering also usually marks the beginning of blackfly season, and does so again this year. (But I expect a short and sparse blackfly season again this year.) Can be grown as a shrub; it takes well to pruning (an unintended pun on the Genus...)
Flowers of the Cornelian Cherry, Cornus mas. This is the first time I have seen this shrub flower for me, although it is a bit hidden and I somewhat gave up on it years ago so haven't been looking attentively; for a first flowering it has quite a mass (again a naming pun!!) of flowers on it, most of them out of the frame of th camera. Planted in about 1991 or 2, one of the first tissue culture plants I bought through the Rhododendron Society. It's been a bit of a wait.
Red Barrenwort, Epimedium x rubrum, a fine slow-growing groundcover sub-shrub. Most years there is some old foliage which survives to hide the new growth and flowers a bit, but this year for some reason nothing. Maybe eaten by rabbits or something.
Maire's Peony, Paeonia mairei, the earliest to flower for me, but these are still in small pots near the front of a pot farm so maybe they would be later if they were in the ground. Or maybe not. A fairly small plant, but I no longer attribute that to them being in pots, as they are well-rooted through the drainage holes into the soil beneath.
Woolly Peony, Paeonia tomentosa, buds just starting to show some colour. Before P. mairei showed itself a couple of years ago, this was always the first peony to bloom, with no overlapping species. It's one of the lesser-known yellows from the Caucasus.