Phaseolus maculatus, commonly known as Spotted Bean, is a deciduous perennial vine or herb. It is native to a range of habitats including open woodlands, forest edges, and chaparral in the Southwestern United States and Northwest Mexico. This plant is characterized by its trailing habit and a large, woody taproot, which allows it to survive in arid conditions. The leaves are trifoliate, meaning they are composed of three oval leaflets, each up to 8 cm (3.2 in) long, with small uncinate (hooked) hairs that help in water conservation. The leaf blades are oriented vertically, which minimizes sun exposure and reduces water loss. Phaseolus maculatus blooms with purple flowers that are modest in size but can be quite attractive when viewed up close. The seeds are distinctively mottled with black and brown, adding to the plant’s ornamental value.

In cultivation, the Spotted Bean is valued for its drought tolerance and its ability to adapt to various soil conditions, although it prefers soils with medium drainage. It is suitable for xeriscaping, wildlife gardens, and as a ground cover in areas with dry climates. While it thrives in full sun or part shade, it requires medium amounts of water, especially during prolonged dry periods. Gardeners should be aware that, like many beans, it may be susceptible to pests such as bean beetles. However, its resilience and low maintenance make it a good choice for gardeners looking to add a touch of the Southwest to their landscapes.CC BY-SA 4.0