Sequoia gigantea vs Sequoia Wellingtonia

Sequoia gigantea and Sequoia Wellingtonia both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sequoia gigantea	Yes	No	No	No
Sequoia Wellingtonia	Yes	No	No	No

As nouns, Sequoia gigantea and Sequoia Wellingtonia are synonyms defined as:

Sequoia gigantea and Sequoia Wellingtonia: extremely lofty evergreen of southern end of western foothills of Sierra Nevada in California; largest living organism

Other synonyms of Sequoia gigantea include big tree, giant sequoia, Sequoiadendron giganteum, Sierra redwood.

Sequoia gigantea (noun)	Sequoia Wellingtonia (noun)
extremely lofty evergreen of southern end of western foothills of Sierra Nevada in California; largest living organism	extremely lofty evergreen of southern end of western foothills of Sierra Nevada in California; largest living organism