Here you can find a lot of low-poly plants (around 60 unique meshes) with a good quality backed from high-poly sculpts textures. All plants gathered at two 4096x4096 texture sets.
Sketchfab preview
Triangle counts from 40 triangles to 1700

Technical Details​

Number of Unique Meshes: 64
Collision: No
LODs: No
Number of Materials and Material Instances: 6
Number of Textures: 16
Texture Resolutions: 4096x4096
Supported Development Platforms:
Windows: Yes
Mac: Yes