What is the specific epithet of this plant?

A noun phrase forms a major part of a sentence.

His name is John.

He played the leading role in the movie.

He lived in Japan for about 10 years.

This medicine eases the symptoms of a cold.

It's difficult to find the English translation of this book.

This miracle drug completely cured my illness.

Please translate this document.

He is good at translating that document.