The truth is that this pacage of vegetation is more complex to implement in game and it will need some sort of reduction to work. I would dare to say it needs animation, collision sounds and maybe casting alpha shadows.
I imagine every vegetation model acompanied with a variety of sounds like birds, leaves moving during animated gusts of wind and cicada sounds, making it a whole ecosystem that spreads out occuping a large amount of gamers perception with very small amount of mapping around it.