"My pick for favorite spring bloom in the shade is Lathyrus vernus aka "spring vetchling". The violet -blue color of this non-vining pea flower is so beautiful. It blooms at the same time as late daffodils and Hellebores in my garden. I have it growing in dry shade and in moist sunnier spots, too. It is very adaptable.
It looks stunning with Euphorbias and Pulmonarias. Here is a combo I love--Lathyrus vernus in front of Chamaecyperis 'Mops'. Purple and that limey green are my FAVORITE color combination!
In my garden, Lathyrus vernus gets maybe a foot high and wide. I get seedlings now and then, not in profusion--but just enough that since my first purchase of Lathyrus vernus twenty years ago, I now have several of this favorite plant.
Try this one--you will love it."