pachycauls

Example:In contrast to the pachycaul, the thin stem of the fern was delicate and light, with a more traditional structure.

Definition:A slender, narrow stem of a plant, often seen in non-arid-adapted species.

Example:The dry stem of the maple tree was a stark contrast to the lush, fleshy pachycaul of the cactus beside it.

Definition:A stem that is not fleshy or water-storing, more typical of temperate and tropical climates.