Salix purpurea vs purple osier

Salix purpurea and purple osier both are nouns.

Word	Noun	Adjective	Verb	Adverb
Salix purpurea	Yes	No	No	No
purple osier	Yes	No	No	No

As nouns, Salix purpurea and purple osier are synonyms defined as:

Salix purpurea and purple osier: Eurasian osier having reddish or purple twigs and bark rich in tannin

Other synonyms of Salix purpurea include basket willow, purple willow, red osier, red willow.

Salix purpurea (noun)	purple osier (noun)
Eurasian osier having reddish or purple twigs and bark rich in tannin	Eurasian osier having reddish or purple twigs and bark rich in tannin