whitlavia vs phacelia

whitlavia and phacelia both are nouns.

Word	Noun	Adjective	Verb	Adverb
whitlavia	Yes	No	No	No
phacelia	Yes	No	No	No

As nouns, phacelia is a hypernym of whitlavia; that is, phacelia is a word with a broader meaning than whitlavia:

whitlavia: desert plant of southern California with blue or violet tubular flowers in terminal racemes
phacelia: any plant of the genus Phacelia

Other hypernyms of whitlavia include scorpion weed, scorpionweed.

whitlavia (noun)	phacelia (noun)
desert plant of southern California with blue or violet tubular flowers in terminal racemes	any plant of the genus Phacelia