Alsophila spinulosa, also known as "Alsophila spinulosa", "Pen Tree", "Big Flower Fern" and "Suogong Tree". Alsophila spinulosa is a rare plant under national first-class protection. Pteridophyte Cyatheaceae. Trees are like ferns, with trunk 3-8 meters high and big leaves. It stretches out from the top of the trunk in an umbrella shape, which is elegant and has good ornamental value. The prickly trunk has a hard skin and beautiful patterns. If it is still unclear, refer to the difference between trees and shrubs.

The difference between trees and shrubs:

Woody plants with upright trunks and a height of more than 5 meters are called trees. Corresponding to the low shrubs, the tall trees that are usually seen are arbors, such as kapok and magnolia.

Woody plants with inconspicuous trunks and often multi-branched bases are called shrubs, such as roses and dragon boat flowers.