| A | B |
| Rhizome | An underground stem that grows horizontally. It may grow adventitious roots and stems to develop as a separate plant. |
| Tuber | An enlarged part of a stem that grows underground. Can develop into a separate plant. |
| Tendril | A threadlike leafless growth on a stem that attaches itself around other stems and objects. |
| Stolon | An above ground stem that grows horizontally and propagates new plants. |
| Bulb | An underground food-storage organ consisting of flattened, fleshy stem-like leaves with roots on the lower side. |
| Corm | A food storage structure at the end of a stem that grows underground. It is an enlarged or swollen stem base. |
| Cladophyll | A leaflike branch that resembles a leaf. It is also called a cladode. |
| Stem | The central axis that supports the leaves and connects them with the roots |