Geum virginianum vs avens

Geum virginianum and avens both are nouns.

Word	Noun	Adjective	Verb	Adverb
Geum virginianum	Yes	No	No	No
avens	Yes	No	No	No

As nouns, avens is a hypernym of Geum virginianum; that is, avens is a word with a broader meaning than Geum virginianum:

Geum virginianum: avens of Virginia having pale or greenish yellow flowers
avens: any of various perennials of the genus Geum having usually pinnate basal leaves and variously colored flowers

Geum virginianum (noun)	avens (noun)
avens of Virginia having pale or greenish yellow flowers	any of various perennials of the genus Geum having usually pinnate basal leaves and variously colored flowers