Stalk

noun

1. The stem or main axis of a plant, which supports the seed-carrying parts.

   "a stalk of wheat, rye, or oats;  the stalks of maize or hemp"

2. The petiole, pedicel, or peduncle of a plant.
3. Something resembling the stalk of a plant, such as the stem of a quill.
4. An ornament in the Corinthian capital resembling the stalk of a plant, from which the volutes and helices spring.
5. One of the two upright pieces of a ladder.