Attached Link: http://www.3dplants.com

Drew Costigan did very good grasses and weeds models in 3DS format.

you can download them here :

http://3dmodelworld.com/3dsmodels4.asp

or directly at :

http://www.3dplants.com

(go in the "free models" section)

There is no texture included, but you can create one very quickly in VUE (a green gradient with yellow highlights and variable transparency works nicely).

You don't need many of these models to cover a large area. In the following picture, I used only 8 of them in foreground :

http://www.renderosity.com/viewed.ez?galleryid=141357

ERic