genus Castilleja vs genus Castilleia

genus Castilleja and genus Castilleia both are nouns.

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

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

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

Other synonyms of genus Castilleja include Castilleia, Castilleja.

genus Castilleja (noun)	genus 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