Often used synonymously with ヤハズエンドウ in everyday contexts, though botanically they may refer to the same or closely related species.
Katakana spelling is common for this plant name; usually written in kana.
Kanji spelling is rare; the word is usually written in kana.
The name ヤハズエンドウ comes from the shape of the leaf tip resembling an arrow notch (矢筈, やはず) and エンドウ (pea).