Foliage brush I use to paint trees and shrubs on my illustration.
This brush is primarily used to paint the foliage on a tree or shrubs.
You can use bigger brush sizes to block out the general shape of the foliage first, then use smaller brush sizes to add details.
You can also adjust the [Color mixing] properties on the [Ink] category on the sub tool detail palette and the [Gap] on the [Brush shape] → [Stroke] category to your liking.
To get the reddish effect on the foliage, you can set the Sub color to brown first.
Feel free to use and experiment with it!