A person is called pithy when they are concise and forcefully expressive. Did you know that many plants can also by pithy?
Pith, also known as medulla, is a type of plant tissue that stores and transports nutrients. Typically, it is very soft and spongy.
In the very center of many stems, you can see a spongy area. This is particularly noticeable inside sunflower stems and their central cores, or steles. This is pith. Xylem surrounds the pith, and phloem are outside of the xylem. When pith first develops, it is white. As it ages, it can darken. In some plants, the pith may disintegrate completely, while, in others, the pith may have a chambered structure.
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