genus Castanopsis vs Castanopsis

genus Castanopsis and Castanopsis both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Castanopsis	Yes	No	No	No
Castanopsis	Yes	No	No	No

As nouns, genus Castanopsis and Castanopsis are synonyms defined as:

genus Castanopsis and Castanopsis: evergreen trees and shrubs of warm regions valued for their foliage; southeastern United States and eastern Australia and northern New Zealand

genus Castanopsis (noun)	Castanopsis (noun)
evergreen trees and shrubs of warm regions valued for their foliage; southeastern United States and eastern Australia and northern New Zealand	evergreen trees and shrubs of warm regions valued for their foliage; southeastern United States and eastern Australia and northern New Zealand