Some wonderful and useful Xfrog, Inc models for lot of scenes I like to use :
Tropical with 20 species native to the world’s tropic regions. Each species includes 3 variations in age, size and shape for a total of 60 highly detailed, fully textured 3D models.
Oceania 3 with 20 species from all over Australia and Oceania. 9 variations in age, size and shape
USA Southwest contains 3D plant models of 20 species of cacti and succulents native to the deserts of the American Southwest. 3 variations in age, size and shape
USA Conifers contains 3D tree models of 20 species native to North America. 3 variations in age, size and shape
Europe 3 a collection of very detailed 3D trees. 20 species from all over Europe at different ages and varied seasons. 9 variations.
Agriculture 20 with species. 9 variations in age and shape