IAN symbol libraries currently contain 2740 custom made vector symbols for science communication, including eight flora themed albums. Each free botanical icon set can be downloaded as an individual file or on palettes as shown below. You will need to give credit to the University of Maryland Center for Environmental Science, who created this plant art, if you use them. But if you don’t want to do that, you can also pay a fee. Such a diverse range of organisms are covered here in quite some detail, making them much more unusual, extensive and interesting than your average plant or botanical icon. Download and load into Photoshop and Illustrator or just keep in your images folder to use in whatever way you want.
Courtesy of the Integration and Application Network, University of Maryland Center for Environmental Science (ian.umces.edu/symbols/)