Final answer:
The plant also known as woody nightshade is belladonna or deadly nightshade. An oxymoron for the taste of some chocolate would be bitter.
Step-by-step explanation:
The plant also known as woody nightshade is belladonna or deadly nightshade. It is a poisonous plant that can cause severe symptoms when ingested. An oxymoron for the taste of some chocolate would be bitter as chocolate is typically associated with a sweet taste.