Colors of guaraná

It's always satisfying to see new leaves coming forth on the guaraná plants (Paullina cupana) because the old leaves seem to attract a lot of dust from the summer season. Unfortunately, they don't come clean with the rains. Most of the leaves in the image are new, thus the bright shiny appearance. The young buds take on a "don't eat me" color in the beginning but then they quickly grow into the very large leaves characteristic of the guaraná plant. I use the word "plant" lightly because guaraná is actually a vine, when planted in the shade of trees. Out in the open it becomes a small tree. The fruit of the guaraná is a stimulant.