genus Castilleja vs Castilleia

genus Castilleja and Castilleia both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Castilleja	Yes	No	No	No
Castilleia	Yes	No	No	No

As nouns, genus Castilleja and Castilleia are synonyms defined as:

genus Castilleja and Castilleia: genus of western North and South American perennials often partially parasitic on roots of grasses

Other synonyms of genus Castilleja include Castilleja, genus Castilleia.

genus Castilleja (noun)	Castilleia (noun)
genus of western North and South American perennials often partially parasitic on roots of grasses	genus of western North and South American perennials often partially parasitic on roots of grasses