sterculia vs angiospermous tree

sterculia and angiospermous tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
sterculia	Yes	No	No	No
angiospermous tree	Yes	No	No	No

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

Other hypernyms of sterculia include flowering tree.

sterculia (noun)	angiospermous tree (noun)
any tree of the genus Sterculia	any tree having seeds and ovules contained in the ovary