To download zipped versions of these DFX plants click on the thumbnail above. They were constructed in 'Plant Studio' a brilliant and very reasonably priced modeller for herbaceous and grassy plants.
Lots of pre-set plants are available free of charge if you have a registered version of the software. Its also very easy to produce your own plants both real and imagined. Read the zipped text file for instructions on how to use the models.See here for large collection of parameter files