Acorns are the nut of the oak tree. They start green and gradually go brown as they ripen. Squirrels are very fond of acorns.

A culinary berry is any small, edible fruit, such as strawberries or raspberries. True botanical berries are defined by how the fruit was formed, and neither strawberries or raspberries are true berries.

True berries include blueberries, tomatoes, capsicums, cranberries and grapes. There are many other botanical berries that are not edible. All of these true berries have the fruit made from a single ovary with the seeds inside.

Branches are parts of a tree that are connected to the main trunk of a tree. Some trees have a very short trunk and lots of thick branches. Most branches are diagonal and point upwards, except in weeping trees where they may droop downwards. A very small branch is called a twig.

A bulb is a part of a plant that is usually below the ground, or partly below the ground. Bulbs are usually quite spherical but pointed at the top like a teardrop. Bulbs grow roots from the bottom and leaves from the top.

Some types of plants that grow from bulbs are onions, lilies and tulips.

Anything that has a similar shape to a bulb may also be called a bulb, such as the bulb at the bottom of an old fashioned thermometer.

Flowers are the part of a plant that is used to make seeds, which grow into baby plants. Flowers are usually very pretty. The reason for this is the plant needs insects to come to the flowers and fertilize them so seeds can develop. Insects are attracted to the flowers by their colour and the sweet nectar that the plant grows inside the flower as a reward for the insects.