More questions than answers?

Cant help, I'm afaraid Siris....it's a dainty little plant. It is frustrating when you don't know what happened to plants that disappear. Happened to me a lot at my last garden but that was partly my fault as I had a lot of big clumps of vigorous which would swamp others and before I realised it, they'd gone!

I don't think it is Siris, looks like moss forming to me.

Thanks Paul, my garden is really densely planted, so it's not surprising I lose plants.
Sb, The eureka moment came while I was looking at the foliage on your Corydalis. I nearly deleted the last photo after I enlarged it to produce the first, trimming off the bottom.
It is definitely not moss. Actually thinking about it I only get moss in the grass and in the pond round the Sarracenias but never (never say never) in the borders.

Answering your first question your plant looks more like a Heloniopsis, than a Ypsilandra!! and I would imagine slugs have eaten your spare!!
I have looked very closely at the plant emerging and it does not look like Corydalis, I have to agree with Seaburn, it looks very moss like........you will have to keep us posted on this one Siris!

Will let you all know about the results. As for the lost
?Heloniopsis? Looking at 2015 pic it was the back one that flowered last year, maybe the front one is struggling under a section of the ?Corydalus? the bit that looks like a liverwort. Not able to enlarge anymore clearly.
Ps London Pride to right, should be Roscoea to left.

Agree with dotty blown it up 3x looks like moss

I thought it was corydalis too but not convinced any more. (Went out in the rain to check with two of mine) Shall you would leave it for a while though just to make quite sure?

Oh no, Brian, after all you helpful thoughts, you have shattered my hopes, but I am ever optimistic.
Thank you Stera, for braving the rain. It will definitely have to be left for a while for various reasons.

I see what looks like "Turtleheads" which is a plant I'm looking for. Those basal rosettes look like healthy plants. I'd just let them grow and see what they become.

Good luck in finding your Turtleheads, Bathgate, but the rosettes are definitely not that, only a small alpine plant.

I know they aren't turtleheads, I was just noting the similarity. I just found my turtleheads, yey! :)

Oh good, Bg. Expect they were difficult to locate under your recent snow.

yeh, I won't be planting them anytime soon. Another big storm is going to hit us on Tuesday. I found a a nursery and I can order them online once the weather warms up. They are native to my area so I shouldn't have trouble growing them.