The red bean tree usually blooms in the spring, butterfly-shaped corolla, white or reddish, panicle. When blooming, not full of trees in unison, but divided into east, west, south and north of the branches of the four directions of flowering, only one direction a year. The red bean fruit pods are long oval, 4 to 6.5 centimeters long. Each pod contains 1 to 2 seeds. When ripe, the shell is yellow, and the fruit is reddish, shiny, and 1.5 to 2 centimeters long. Red bean fruit, is a rare fruit. In ancient times, people took red beans as a symbol of mutual longing and love token, called Acacia beans. Tang Dynasty poet Wang Wei in the "Acacia" poem: "Red beans are born in the south, spring hair a few branches. I wish you would pick them more often, this thing is the most lovesick." The crimson red bean fruit, set in jewelry, is very valuable.