Attached Link: Forest Wonders example

This is extremely helpful, thank you!

Actually, given this information, I would probably go with the free Ivy Generator + Carrara's own plant editor instead.

I've had pretty good results before when I used the plant generator to create leaves and branches and then surface multiplied those onto a modeled trunk or onto Ivy Generator-produced geometry. You can get very good diversity this way, and the bonus is that you are not paying the price in render time for the alpha maps, nor are you limited in how the resulted conglomerate is rotated, allowing for easy randomized replication for a complex landscape. 

I've used this method in the attached image (see link), and replaced the transmapped branches/leaves with Carrara-plant-editor generated ones. (I left a few behind: some Ivy and grass that came with the Stonemason's set are still there and transmapped, but there are only a few of them left, and if I had to push the image further, I'd replace them too)