The words in the sentence that function as adjectives are climbing, supple and other.
Adjectives are words used to describe other words. Generally, adjectives modify nouns and contribute to make the meaning of a sentence more accurate. Furthermore, adjectives can denote temporary or permanent qualities. In this sentence, the three adjectives are modifying nouns: "climbing" is modifying "plants", "supple" is modifying "stems" and "other" is modifying "plants".
