tarweed vs Madia sativa

tarweed and Madia sativa both are nouns.

Word	Noun	Adjective	Verb	Adverb
tarweed	Yes	No	No	No
Madia sativa	Yes	No	No	No

As nouns, Madia sativa is a hyponym of tarweed; that is, Madia sativa is a word with a more specific, narrower meaning than tarweed:

tarweed: any of various resinous glandular plants of the genus Madia; of western North and South America
Madia sativa: South American herb with sticky glandular foliage; source of madia oil

Other hyponyms of tarweed include Chile tarweed, madia oil plant, melosa.

tarweed (noun)	Madia sativa (noun)
any of various resinous glandular plants of the genus Madia; of western North and South America	South American herb with sticky glandular foliage; source of madia oil
any of various western American plants of the genus Grindelia having resinous leaves and stems formerly used medicinally; often poisonous to livestock