Trillium sessile vs trillium

Trillium sessile and trillium both are nouns.

Word	Noun	Adjective	Verb	Adverb
Trillium sessile	Yes	No	No	No
trillium	Yes	No	No	No

As nouns, trillium is a hypernym of Trillium sessile; that is, trillium is a word with a broader meaning than Trillium sessile:

Trillium sessile: trillium of northeastern United States with sessile leaves and red or purple flowers having a pungent odor
trillium: any liliaceous plant of the genus Trillium having a whorl of three leaves at the top of the stem with a single three-petaled flower

Other hypernyms of Trillium sessile include wake-robin, wood lily.

Trillium sessile (noun)	trillium (noun)
trillium of northeastern United States with sessile leaves and red or purple flowers having a pungent odor	any liliaceous plant of the genus Trillium having a whorl of three leaves at the top of the stem with a single three-petaled flower