Plant stems provide the plant with
The stems can have nodes at intervals along its length and this is seen in flowers, shrubs, vegetables and at a higher point trees.
The node is an area where one or maybe more leaves are produced. This may also have a bud that can develop into a branch.
When arranging flowers some leaves may be removed from the stem and the point where the leaves meet the stem is the node.
The part of the stem in-between each node is called the internode and could be described as the space between the nodes.
Not all stems are the same but the function is to help the plant and there are a lot of variations for the individual species of plant.
It is hard to believe that the stems or trunks of the tree that we can look and feel is dead wood.
The cambium of the tree are the cells that are live and help the tree to grow upwards, into and ground and outwards.
Every spring the cambium makes large cells to help carry water and minerals in the main growing season and in the summer it makes thicker walled cells.
These light (Spring) and dark (summer) cells give rise to the rings that can be seen inside a tree trunk when it is cut down. These can change appearance during times of drought or disease so giving a history of the health of the tree over the years.
Not all plants have strong sturdy stems, climbing plants have delicate often very fragile stems and need support while they grow. This can be done by having strong supporting canes or growing within another tree or shrub that it can cling to.
Once it has the support its growth can be quite vigorous as with some types of creepers or clematis.
Cacti have stems that contain a lot of tissue which can then hold water during the hot weather.
These plants can be distinguished from other succulents because they have growths on their stems called "Areoles".
This is where any spines, hairs, shoots and flowers will grow from.
There are some stems that are underground
Another function of the stem is to provide waterproofing, exchanging gases and for protection.