Since the page says "Plants are Minecraft's representation of plant life," then grass blocks, tall grass, and trees should be added to this page. Those are representations of real plant life. If the purpose of this page is to present all the forms through which Minecraft displays plant life, then I'd happily edit the page.
tl;dr: The purpose of this page is vague. Plants are missing from its lists. Camo Shoe Club 03:08, 4 September 2011 (UTC)