Sophora japonica generally blooms in April and May every year, and the flowering period is generally about 10-15 days. ?

The shape of Sophora japonica: terminal panicle, 15-30cm long; calyx bell-shaped, 5-lobed; corolla butterfly-shaped, milky white, flag petals broad heart-shaped, with short claws, slightly purple veins , the wing petals and keel petals are both rectangular; the stamens are 10, separated and unequal in length; the chamber is tube-shaped, with long and slender hairs, and the style is curved. The pods are fleshy, bead-shaped, 2.5-5cm long, yellow-green, hairless, not dehiscent, and the seeds are very narrow. 1-6 seeds, kidney-shaped, dark brown.

Sophora japonica flowers contain rutin, which is more in the buds and less after opening. Triterpene saponin 0.4 was obtained from dried flower buds, and after hydrolysis, betulin, sophoradiol, glucose, and glucuronic acid were obtained. In addition, sophora rice plant A (14), B (1.25) and C (0.35) were obtained from the flower buds. A is a flavonoid different from rutin, and B and C are sterols. It also contains tannins, and the content of raw Sophora japonica flowers is 0.66. The tannin content of Sophora japonica charcoal is about 4 times that of raw Sophora japonica flowers.

Because sophora japonica is relatively sweet, it is best not for people with diabetes to eat too much. Steamed sophora japonica is not easy to digest, and people with poor digestive systems, especially middle-aged and elderly people, should not consume it in excess. At the same time, people with allergic constitution should also be careful when eating sophora flowers. People with spleen and stomach deficiency should take it with caution.