genus Erythroxylum vs Erythroxylon

genus Erythroxylum and Erythroxylon both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Erythroxylum	Yes	No	No	No
Erythroxylon	Yes	No	No	No

As nouns, genus Erythroxylum and Erythroxylon are synonyms defined as:

genus Erythroxylum and Erythroxylon: a large genus of South American shrubs and small trees of the family Erythroxylaceae

Other synonyms of genus Erythroxylum include Erythroxylum, genus Erythroxylon.

genus Erythroxylum (noun)	Erythroxylon (noun)
a large genus of South American shrubs and small trees of the family Erythroxylaceae	a large genus of South American shrubs and small trees of the family Erythroxylaceae