1. These plants produce no flowers and seeds during the first year of their life.
2. These plants, during the first year, lay up a store of food in roots, leaves, or stems.
3. The food is used in the second year of the plant's life to nourish the flowers and seeds.
A biennial should be grown for two years in the school garden to furnish material for concrete study.
In a similar way discuss a few common types of perennials, such as rhubarb, dahlia, apple tree, and develop the following points:
1. These plants may or may not produce seeds during the first year's growth.
2. Some of these plants are herbs, but most of them are trees and shrubs.
3. Food is stored in roots or stems to provide for early spring growth.
4. These plants live on from year to year.