Forgive me if this has been brought up before (I was unable to find any mention in the forums or page-comments), but I could not help but comment.
The "Corn" plants' physical structure resembles some unholy union of Tobacco and Bamboo.
-The Leaves are short, have veining branching off from the center, and are dense and bushy. Thus, the foliage resembles tobacco.
-You've got the vertical stalks right, but the positioning and clustering of the leaves resembles much more that of bamboo than of Corn.
-Corn is a member of the monocot grass family. It grows up from a central stalk with long arching leaves (with parallel veining structures) coming off of it at regular intervals.
-At its peak, it has a (straw colored) flowering tassled structure sticking up, fluffy with little pollen-pod thingies.
-The Ears of corn point upwards, not outwards, or hanging down. They are situated at the "armpit" of where the leaves come away from the stem.
-Biggest issue: The corn kernels ARE NOT EXPOSED. Ears of corn, no matter what stage of development, stay inside their husk, which is composed of long (corn)leaf-like structures growing from its base and wrap around it. Not short bushy frills around the bottom. The only thing that ever sticks out of the husk is the corn silk (which is what catches the pollen to fertilize the kernels).
Whew, [wipes froth from mouth], that's basicly it. Again, apologies if you have had to face this criticism before. I also recognize that at this point in the comic, it is likely impossible to fix, without a break in artistic continuity.
I have to wonder though, did the artist (hi there! great work otherwise.) simply...not know what a corn plant looks like? There are plenty of reference photos on the web, to see the anatomy, but I suppose he simply didn't look at any. Did he have some sort of strong pre-conceived notion of what they ought to look like, and hence "no need" to look it up? (I personally grew up with corn in my backyard, and so am intimately familiar with it, but not all are so fortunate.)
But, this being a different parallel universe and all, it's probably some exotic variety of "shadow-corn" or "cornacco", or some other semi-plausible internally consistent excuse. After all, it's the only logical explanation.

