四季豆（Phaseolus vulgaris）包括云藊豆、白肾豆、架豆、芸豆、刀豆、玉豆、去豆等，一年生豆科植物，是餐桌上的常见蔬菜之一。

油豆角（Phaseolus vulgaris L. var. chinensis Hort.）是蔓生菜豆在中国东北的优质软荚变种。以荚内油份多得名，有500年的栽培历史。 油豆角主要是以食荚为主, 烹煮后豆荚软面, 纤维少, 豆香味浓, 蛋白质含量较高。

矮菜豆，或者矮生菜豆（Phaseolus vulgaris L. var. humilis Alef.）是菜豆种的一个变种，就是广州常见的龙牙豆。

Phaseolus vulgaris, the common bean (also known as the string bean, field bean, flageolet bean, French bean, garden bean, green bean, haricot bean, pop bean, or snap bean), is a herbaceous annual plant grown worldwide for its edible dry seed (known as just "beans") or unripe fruit (green beans). Its leaf is also occasionally used as a vegetable and the straw as fodder. Its botanical classification, along with other Phaseolus species, is as a member of the legume family Fabaceae, most of whose members acquire the nitrogen they require through an association with rhizobia, a species of nitrogen-fixing bacteria.