Ephedra sinica vs ephedra

Ephedra sinica and ephedra both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ephedra sinica	Yes	No	No	No
ephedra	Yes	No	No	No

As nouns, ephedra is a hypernym of Ephedra sinica; that is, ephedra is a word with a broader meaning than Ephedra sinica:

Ephedra sinica: Chinese ephedra yielding ephedrine
ephedra: jointed and nearly leafless desert shrub having reduced scalelike leaves and reddish fleshy seeds

Other hypernyms of Ephedra sinica include joint fir.

Ephedra sinica (noun)	ephedra (noun)
Chinese ephedra yielding ephedrine	jointed and nearly leafless desert shrub having reduced scalelike leaves and reddish fleshy seeds