Zigadenus venenosus gramineus vs Zigadenus venenosus

Zigadenus venenosus gramineus and Zigadenus venenosus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Zigadenus venenosus gramineus	Yes	No	No	No
Zigadenus venenosus	Yes	No	No	No

As nouns, Zigadenus venenosus gramineus and Zigadenus venenosus are synonyms defined as:

Zigadenus venenosus gramineus and Zigadenus venenosus: plant of western North America to Mexico; poisonous especially to grazing animals

Other synonyms of Zigadenus venenosus gramineus include grassy death camas.

Zigadenus venenosus gramineus (noun)	Zigadenus venenosus (noun)
plant of western North America to Mexico; poisonous especially to grazing animals	plant of western North America to Mexico; poisonous especially to grazing animals