Smilax biflora var. trinervula
A variety of greenbrier; a botanical term. Usually written in katakana.
Sarumame is a plant of the Smilacaceae family.
Katakana spelling is common for this plant name; usually written in kana.
Kanji spelling is rare; the plant is usually written in kana.
The name likely derives from 猿 (さる, monkey) and 豆 (まめ, bean), but the exact origin is uncertain.