sorrel tree vs flowering tree

sorrel tree and flowering tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
sorrel tree	Yes	No	No	No
flowering tree	Yes	No	No	No

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

sorrel tree: deciduous shrubby tree of eastern North America having deeply fissured bark and sprays of small fragrant white flowers and sour-tasting leaves
flowering tree: any tree having seeds and ovules contained in the ovary

Other hypernyms of sorrel tree include angiospermous tree.

sorrel tree (noun)	flowering tree (noun)
Australian tree with acid foliage	any tree having seeds and ovules contained in the ovary
deciduous shrubby tree of eastern North America having deeply fissured bark and sprays of small fragrant white flowers and sour-tasting leaves