Compiled from the Note Identification Project Thread:
Lemongrass (EO, origin unknown)--3 drops on a cotton, wafted
Lemony, minty and earthy--it smells like the sun-warmed lemon mint plants I used to have in my garden (I think it was Melissa), but much more strong in the lemon part of the balance. Upon drydown, I get the same impression as purplebird--lemony dusting polish. It is pleasant, and sort of reminds me of Old English Lemon Oil. When dry, it is definitely much less sharp, and has a very nice mellow roundness that seems grassy and fruity.
Lemongrass, origin unknown – Bright and lemony, not as delicious as lemon peel, more woody and oily. Has the classic “furniture polish” aroma. Long-lasting. A great addition to improve the longevity of citrus oils.
Lemongrass – remind me much more of lemons than of the herb
To me it's like lemon mixed with a sweet mint.