I have one close. Hardy to zone 5 or more. Unknown as well.
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From top to bottom:

Euphorbia palustris
Euphorbia myrsinites in a shady spot (the leaf whorls will be tighter and smaller in full fun)
Euphorbia polychroma

Love them!!!

Hey Stush,

Not to be a killjoy, but pls. look closely, they're not close after all.

His has blooms in clusters vs. your (1st pic) which appear as singles;

His has elongated (much longer & slender) leaves which yours do not.

It's not that I wish to split hairs, it's that when IDying things, these differences (subtle or not) really do matter.

Sorry Mike, I can't offer anything besides Euphorbia, but I see that others have.

Bright & pretty whatever they are!

Mike,

Those are some nice ones.

CI,

Thanks for the ID of the E. polychroma - I've got that in the garden as an perennial shrub, too.

And look what they say about it.

Here is a link that might be useful: E. p.

Looks like E. polychroma (photo #2) which I also have growing in the garden. I like it since it is very easy to grow, colors-up the garden very early (like now); it self-seeds for me but not invasive.
I only give it a haircut later in the season since it tends to eventually 'flop' - but it regrows & looks just great until frost.
Nice, easy care plant (milky sap irritating to some as euphorbias are).
Photo #1 is Euphorbia myrsinites (Donkey-tail Spurge), it's trailing. My does not look that great yet-just waking up... (Both photos just taken).
Both do very well in zone 5 (possibly even lower).
Rina

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