Appearance and growth environment.

1. Appearance: The lentil tree belongs to the legume family and is an evergreen or deciduous tree. The tree can reach 10-20 meters in height, with an upright trunk and a round or oval crown. The leaves are odd-pinnately compound, and the leaflets are oblong or lanceolate with serrated edges. The flowers are yellow butterfly-shaped inflorescences, and the pods are flat and sickle-shaped. The saponaria tree belongs to the legume family and is a deciduous tree. The tree can reach 5-10 meters in height, with a thin trunk and an umbrella-shaped crown. The leaves are even-numbered pinnately compound leaves, the leaflets are oblong or obovate, and the edges are serrated. The flowers are purple-red butterfly-shaped inflorescences, and the pods are long, flat, and linear.

2. Growth environment: The bark bean tree likes a warm and humid climate, has strong adaptability, and has good drought and cold tolerance. Commonly found in tropical and subtropical regions, it can also be cultivated in temperate regions. The saponaria tree likes a sunny environment, has no strict soil requirements, and has strong drought tolerance. Commonly found in temperate areas, it can also be cultivated in subtropical areas.