The plural form of 'stipes', which means the stalk or stem of a fungus or mushroom.
Stipites are an important part of a mushroom or fungus.
Examples:
The mushroom's stipites were long and thin.
We found many mushrooms with short stipites.
She picked the mushrooms with the longest stipites.
The stipites of the mushrooms looked like little sticks.
The stipites of the giant mushroom were as tall as trees.
The stipites of the mushrooms were so strong, they didn't break when we picked them.