This is cilantro, believe it or not. It's from our little Chia herb kit that a friend gave us. At least it's growing! We tried some herbs before and they either didn't grow or died quickly.
I thought it was neat that you can see the original seed on the tip, even though the sprout is several inches long now. I used my 60mm macro lens, an off-camera flash to the left, and the background is simply a piece of paper that I propped up. The subtle gradient was accidental, but I like it! FYI, the seed is about 3-4mm in diameter.
Sadly my sensor is very dirty and it really showed at f/29, so me and the healing brush tool spent a lot of time together.
[last year] caught in the act...