http://www.kurtz-fernhout.com/PlantStudio/index.htm
http://www.gardenwithinsight.com/kfs/kfps210.exe

PlantStudio 2.3MB
PlantStudio Botanical Illustration Software is a tool for creating 3D plant models and 2D illustrations. PlantStudio simulates herbaceous (non-woody) plants like wildflowers and cut flowers, vegetables, weeds, grasses, and herbs using a parameter-driven simulation of plant growth and structure. You can "grow" plants over their life cycles, producing lifelike images at any age. You can design, animate and breed a wide variety of plants. By using the "evolutionary arts" of variation and selection in the plant breeder, you can quickly and easily create whole families of unique plants for your 3D scenes. 

PlantStudio works with the graphics tools you already have. You can: copy plant pictures to the clipboard and paste directly to other programs, save plant pictures in BMP format, write DXF files to read in your 3D programs, create image hose nozzles for MetaCreations Painter and picture tubes for Paint Shop Pro (not directly -- you have to help out a little in Painter or Paint Shop Pro), create animations of growing or revolving plants by writing out numbered animation bitmaps you can read into your animation maker.