Tomato Stem Primodia

Yesterday, when the cat and I were out in the garden, I spotted something strange on the tomato plants ...

I freaked out, crossed my fingers, and hoped that our tomatoes weren't diseased.

Turns out, this condition, known as tomato stem primodia, is pretty harmless and brought on by excessive moisture and/or high humidity. The little nodes are actually the start of new root systems. It makes perfect sense since it's been raining a lot the past couple of days.