genus Erythroxylum vs genus Erythroxylon

genus Erythroxylum and genus Erythroxylon both are nouns.

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

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

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

Other synonyms of genus Erythroxylum include Erythroxylon, Erythroxylum.

genus Erythroxylum (noun)	genus 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