A small set of foliage brushes, mostly just different variations of a brush.
The variations include an already colored version, a version where you can pick your colors, flat leaves with no details and a combo of the detailed and flat ones (where you pick your own colors).
The monochrome ones are colored with the main and sub color; main for shadows, sub for highlights.
Alternatively you could also color them with a gradient map and adjust with other tonal corrections (brightness & contrast, color balance…). Left is black and white, right is after using a gradient map and adjustments.
Quick example:
You can use a sharpen filter in the end for clearer details like here.
Category 1