I am amazed at the diversity of plants in your garden, Eric (and just a teeny weeny bit envious 

).
They look gorgeous and so captivating. 
I love that double yellow Hellebore. Its unusual and a real beauty.
Your Irises are sooooo lovely.
It must be a pleasure to tour your garden on a daily basis and see all your flowers come into season.
RE: 
Corydalis solida Beth Evans.
I really DOOO like that. I have the yellow (self seeds all over the place, but I like it).
Ive tried the blue variety but it huffs and puffs and does not overwinter for me.
RE 
Thug weed celandine
I do believe I have that 
 Does it have a little balled cluster of about 2/3 mm creamy white balls as a root?
When disturbed, they break up and - spread? 

 I now have large carpets of them in places. 
I had already resolved to plant many more crocus and snowdrops in my garden - you have encouraged me even more 

Ive been planting dozens of tulips each year so expect a good show again this year, but the crocuses come into season that bit earlier and add real beauty and interest to the spring garden.
RE: 
The plaster is on the finger where I ripped off the nail yesterday.
Ouch! Having broken the top part of a nail off before (a few times) I know just how painful that can be.
What happened?