| Ferns generally lack some of the more typical adaptations of xerophytes, such as a thick hypodermis, sunken stomata, and CAM photosynthesis. |
| The plants that are adapted for living in these habitats are called xerophytes, mesophytes, and hydrophytes, respectively. |
| Although xerophytes normally have a number of adaptations to hydric stress, mesophytes can also adapt in order to survive in environments where seasonal deficits occur. |
| High stomatal frequencies are usually characteristic of leaves of xerophytes. |
