I put together some helpful activities that I found for free. Its so important that the children are able to identify and differentiate between the different types of plants. It could be one little detail that makes one plant okay to eat and another one poisonous! So below are some activities that you can do before or after to help teach the different shapes of leaves and "margins" to help train their eyes.
Leaf Identification Power Point FREE
Parts of a flower Montessori Matching Cards FREE
Links to Free botany activities (purple links are free)