A lot of common vetch grows in the fields around here.
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).