The iron tree fruit known as "Phoenix Egg" is actually edible, but it cannot be eaten directly. It must be dried first and then boiled in water before it can be taken. Iron tree is a very common ornamental plant in daily life and belongs to the Cycadaceae family. This plant is widely distributed in East Asia, Southeast Asia, Oceania and other regions, and is also grown in Guangdong, Taiwan and other places in China. The iron tree has very strong vitality. Even if its growth point is accidentally damaged, it can still grow new branches and buds at the wound.

As far as the growth environment of iron tree is concerned, this plant likes light and warmth very much. It is precisely because of this that iron trees in the south tend to grow faster than iron trees in the north. In addition, iron trees like moist soil but are very drought-tolerant. If the soil happens to be slightly acidic, it will be more conducive to the growth of iron trees. However, it is worth mentioning that although the iron tree has strong vitality, its growth rate is very slow. The growth lifespan of the iron tree can reach more than two hundred years. Under normal circumstances, the tree may bloom after it is fifteen years old.

Although the iron tree blooms, it is not common. Therefore, the idiom "iron tree blooms" is used to describe things that are rare or difficult to achieve. However, if the temperature and climate are very suitable, it is possible for the iron tree to bloom every year. Due to the influence of these two factors, iron trees in the south are more likely to bloom than iron trees in the north. The iron tree flowers are dioecious. Usually, the iron tree flowers that bloom between June and August are mostly male flowers, and the iron tree flowers that bloom between October and November are female flowers. The male and female flowers of the iron tree are very easy to identify. The former has a columnar inflorescence when it opens, while the latter has a spherical inflorescence. After the iron tree flowers bloom, their flowering period can last for about a month.

In addition to blooming, the iron tree also bears fruit, and the fruit it bears is the iron tree fruit. In fact, the iron tree fruit is not a fruit, but its essence is a seed. According to the Qing Dynasty book "An Illustrated Study of Plant Names and Facts", it can be seen that the iron tree fruit is called "Phoenix Egg" because of its smooth egg-like appearance. In addition, Iron Tree Fruit also has another name called "Fairy Rice". In terms of appearance, the iron tree fruit looks very delicious, but in fact it cannot be eaten directly. This is not to say that iron tree fruit cannot be eaten, but it needs to be dried and then decocted.

Tie tree fruit has very good medicinal effects. By decoction and taking the dried Tie tree fruit, it can reduce phlegm and relieve cough, clear away heat and strengthen the spleen. For people suffering from enteritis, tracheitis and other diseases, iron tree fruit is a very good traditional Chinese medicine. Because the iron tree is easy to plant, it has been given the meaning of "strongness". Many people also regard the iron tree as a plant that can promote feng shui in the home.