Lotus stems are long and thin, like a thick straw. Whole stem is hollow inside with little bumps or rings at certain points along the stem. The inside flesh is usually white or light cream color. Usually eat the younger parts, because they're more tender and easier to chew.

Example

1. In Asia, lotus stem is a popular ingredient in salads, stir-fries, and curries.
2. My brother was counting the holes in the lotus stem.
3. Lotus stem can be sliced thin and pickled.