This logo has a leaf shape. It's 50% circle, 50% square. The circle was too boring (though it is still an alternate version, and there are also high badges) and it was not minty. The colours are #4caf50 and #388e3c.
Now, I have redone it. There are more variants, a new font (Ubuntu Medium in lowercase), and it's pixel-perfect and the "Lm" is aligned to the diagonal. The "L" in the "Lm" was made higher so it does not look like a three-fingered fist anymore (no offence)

Main logo:
With text:
Some high badge version:
The "Lm":
You can also find them here.
Nice preview:
All logos: