Erythroxylum vs Erythroxylon

Erythroxylum and Erythroxylon both are nouns.

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

As nouns, Erythroxylum and Erythroxylon are synonyms defined as:

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

Other synonyms of Erythroxylum include genus Erythroxylon, genus Erythroxylum.

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