Fresh leaves are the young leaves of the plant Erythrina, which belongs to the traditional Chinese medicine and is mainly distributed in Heilongjiang and Jilin, etc. The raw Erythrina leaves contain a lot of oxalic acid, which is unfavorable to the human health, so they can't be eaten raw.

The leaves are mainly found in forests or thickets at an altitude of several hundred meters to 2,000 meters. Prefer warm and humid climate, cold-resistant, resistant to slight shade. Suitable for sunny, deep humus layer, soil slightly acidic sandy loam. The fruit of the prickly five plus is generally mature in mid- and late September each year, its fruit can not be sown directly after harvest, you need to go through a winter to complete the physiological maturation process before the seeds can germinate.