Eryngium vs Eryngium maritimum

Eryngium and Eryngium maritimum both are nouns.

Word	Noun	Adjective	Verb	Adverb
Eryngium	Yes	No	No	No
Eryngium maritimum	Yes	No	No	No

Eryngium (noun)	Eryngium maritimum (noun)
large genus of decorative plants with thistlelike flower heads; cosmopolitan in distribution	European evergreen eryngo with twisted spiny leaves naturalized on United States east coast; roots formerly used as an aphrodisiac