Seriphidium canum vs sage brush

Seriphidium canum and sage brush both are nouns.

Word	Noun	Adjective	Verb	Adverb
Seriphidium canum	Yes	No	No	No
sage brush	Yes	No	No	No

As nouns, sage brush is a hypernym of Seriphidium canum; that is, sage brush is a word with a broader meaning than Seriphidium canum:

Seriphidium canum: low much-branched perennial of western United States having silvery leaves; an important browse and shelter plant
sage brush: any of several North American composite subshrubs of the genera Artemis or Seriphidium

Other hypernyms of Seriphidium canum include sagebrush.

Seriphidium canum (noun)	sage brush (noun)
low much-branched perennial of western United States having silvery leaves; an important browse and shelter plant	any of several North American composite subshrubs of the genera Artemis or Seriphidium