Since the antifreeze proteins have the added effect of making it toxic, it would help to say exactly what proteins they are.
"Terran Holly": just "holly" will do. Hollies are fairly common plants, and the name "holly" would surely not be mistaken for any Sagan 4 organism names, making it needless to call it "Terran" to subtly note it's a real organism.
"mid fall":
Mid-fall.
"slow growing": Slow-growing; "long lived" should also be "long-lived".
The majority of real-world plants are
apparently ectotherms, and this doesn't seem to be an exception. You can therefore mark its thermoregulation as "ectotherm".
The art would look better if the stray lines on the top were cleaned up, and the paper texture diminished by increasing contrast. However, this is a more minor issue. Overall, this organism has only minor issues.