I found it by coincidence just a few weeks before this thread started.
The rest is a lifelong interest in biology, so I'm often aware of the real names of critters. I kid you not, my parents- an MD and a music teacher- got kicks out of teaching me scientific names before common ones. I learned Lepidoptera and Arachnid before butterfly or spider.
Squark-a great white shark with psionic powers & squid tentacles where it’s tail should be-sharkus psionocus squidus?
From xanth comes a trio of weird plants to consider-crabapple-a apple with crab claws-applious cancer
Infantree-a tree that grows battle ready infants-battlreadius homomorph
Tangle tree a oak sized caniverous plant-oakious chompious?