Santa Lucia fir vs true fir

Santa Lucia fir and true fir both are nouns.

Word	Noun	Adjective	Verb	Adverb
Santa Lucia fir	Yes	No	No	No
true fir	Yes	No	No	No

As nouns, true fir is a hypernym of Santa Lucia fir; that is, true fir is a word with a broader meaning than Santa Lucia fir:

Santa Lucia fir: a pyramidal fir of southwestern California having spiny pointed leaves and cone scales with long spines
true fir: any of various evergreen trees of the genus Abies; chiefly of upland areas

Other hypernyms of Santa Lucia fir include fir, fir tree.

Santa Lucia fir (noun)	true fir (noun)
a pyramidal fir of southwestern California having spiny pointed leaves and cone scales with long spines	any of various evergreen trees of the genus Abies; chiefly of upland areas