purple saxifrage vs Saxifraga oppositifolia

purple saxifrage and Saxifraga oppositifolia both are nouns.

Word	Noun	Adjective	Verb	Adverb
purple saxifrage	Yes	No	No	No
Saxifraga oppositifolia	Yes	No	No	No

As nouns, purple saxifrage and Saxifraga oppositifolia are synonyms defined as:

purple saxifrage and Saxifraga oppositifolia: plants forming dense cushions with bright reddish-lavender flowers; rocky areas of Europe and Asia and western North America

purple saxifrage (noun)	Saxifraga oppositifolia (noun)
plants forming dense cushions with bright reddish-lavender flowers; rocky areas of Europe and Asia and western North America	plants forming dense cushions with bright reddish-lavender flowers; rocky areas of Europe and Asia and western North America