Bamboo is a special plant that is neither a grass nor a tree. Morphologically, bamboo looks somewhat similar to a tree, but in fact it is an herbaceous plant.
First of all, we need to clarify the difference between grass and trees. Herbaceous plants are usually low, grow quickly, and have no obvious woody structure. Whereas, the trees are tall and straight, slow growing, and have a pronounced wooden structure.
Although bamboo can grow very tall and large during the growth process, it does not form a significant wooden structure. Although the stem of bamboo is hard, it is made up of a structure called "vascular bundle", which is different from the wooden structure of trees. In addition, bamboo has a relatively short growth cycle and is an herbaceous plant, which is a significant difference from trees.
Therefore, based on the above characteristics, we can conclude that bamboo is a special herbaceous plant, not a tree. Therefore, in terms of classification, bamboo belongs to the grass family, and like other herbaceous plants, it is not classified as woody plants.
Although bamboo bears some resemblance to a tree, its growth pattern and structural characteristics suggest that it is an herbaceous plant. Thus, in plant taxonomy, bamboo is classified as a special group in its own right, belonging to neither grass nor tree.