I was gradually looking through all the items pages in the Encyclopedia, when I came across the pages for the various trees. Is it me, or are the photos on the individual pages of the trees... not the trees we see and know in Ur? Or are they half-grown versions? :) They are interesting art though.
Case in point: Egg Plant:
http://www.glitch.com/items/natural-resources/egg-plant/
But almost all the entries for the trees have different artwork. :)