Yes! I think you are both correct! I kept thinking pachysandra would be solid bright green color and didn't realize the native species was mottled like that. And like you both mentioned, the flowers seemed like Tierella's.
Also, I was cleaning up my gardening tool bag today and FOUND the plastic label "Pachysandra procumbens" inside the bag.

So now I know WHERE to put it.

(after weeding the periwinkle, creeping charlie and garlic mustard and cleaning up the area, mulching, etc.

)
My Iris ...(can't remember the name -- the short little one with blue flowers -- cristata? ) is scattered all over the area. I'm thinking DH must have mowed into it

-- but they seem to have survived the attack and have basically multiplied. (Whew!m

)