1. Download “OSG Export” and Install it
http://osgmaxexp.wiki.sourceforge.net/
2. Use “OSG Export” to export a 3DS model (.max or .3ds) to an OSG model
http://www.schmidt-jensen.com/rune/osg/HOWTO.htm
If the link is broken for in case, the local copy is here.
1179630137.pdf
3D Cafe
http://www.3dcafe.com/index.php?option=com_content&task=view&id=14&Itemid=80
CadPlants
http://www.cadplants.com/
3D XTRAS
http://www.3dxtras.com/3dxtras-free-3d-models-list.asp
Plants 3D models from 3DXTRAS
http://www.3dxtras.com/3dxtras-free-3d-models-details.asp?prodid=2135
http://www.3dxtras.com/3dxtras-free-3d-models-details.asp?prodid=10212
http://www.3dxtras.com/3dxtras-free-3d-models-details.asp?prodid=7689
http://www.3dxtras.com/3dxtras-free-3d-models-details.asp?prodid=9666
http://www.3dxtras.com/3dxtras-free-3d-models-details.asp?prodid=10198