xylosma vs Xylosma congestum

xylosma and Xylosma congestum both are nouns.

Word	Noun	Adjective	Verb	Adverb
xylosma	Yes	No	No	No
Xylosma congestum	Yes	No	No	No

As nouns, xylosma and Xylosma congestum are synonyms defined as:

xylosma and Xylosma congestum: shrub or small tree grown as an ornamental in mild climates for its neat evergreen foliage and fragrant late flowers; native of China

xylosma (noun)	Xylosma congestum (noun)
shrub or small tree grown as an ornamental in mild climates for its neat evergreen foliage and fragrant late flowers; native of China	shrub or small tree grown as an ornamental in mild climates for its neat evergreen foliage and fragrant late flowers; native of China