What are the main methods used for grouping plants?

Plants are mainly grouped by observing their external features, such as size, stem structure, root type, leaf pattern, flowers, and seeds. These characteristics help identify similarities and differences among various types of plants.

One common method of grouping plants is based on their height and stem type, where they are classified as herbs, shrubs, and trees. Plants can also be grouped according to their growth pattern, such as climbers and creepers. Other features, including root systems like taproot and fibrous roots, and leaf venation patterns like reticulate and parallel venation, are also used for classification.

Using these methods allows different plant types to be arranged systematically based on their observable characteristics.