rupestrine plant vs rock plant

rupestrine plant and rock plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
rupestrine plant	Yes	No	No	No
rock plant	Yes	No	No	No

As nouns, rock plant is a hypernym of rupestrine plant; that is, rock plant is a word with a broader meaning than rupestrine plant:

rupestrine plant: plants growing among rocks
rock plant: plant that grows on or among rocks or is suitable for a rock garden

rupestrine plant (noun)	rock plant (noun)
plants growing among rocks	plant that grows on or among rocks or is suitable for a rock garden