Sterculia apetala vs sterculia

Sterculia apetala and sterculia both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sterculia apetala	Yes	No	No	No
sterculia	Yes	No	No	No

As nouns, sterculia is a hypernym of Sterculia apetala; that is, sterculia is a word with a broader meaning than Sterculia apetala:

Sterculia apetala: large deciduous tree native to Panama and from which the country takes its name; having densely leafy crown and naked trunk
sterculia: any tree of the genus Sterculia

Sterculia apetala (noun)	sterculia (noun)
large deciduous tree native to Panama and from which the country takes its name; having densely leafy crown and naked trunk	any tree of the genus Sterculia