The stele of Dryopteris is dictyostelel.

Answer

### Step-by-Step Solution:

1. **Understanding the Term "Stele":**
- The term "stele" refers to the central part of a plant stem or root that contains the vascular tissue (xylem and phloem) and is responsible for the conduction of water, nutrients, and food.

2. **Identifying the Type of Stele in Dryopteris:**
- In Dryopteris, the type of stele is identified as "dictyostele." This means that the vascular bundles are arranged in a network-like pattern.

3. **Characteristics of Dictyostele:**
- In dictyostele, the vascular bundles are not continuous but are found in a series of broken segments. These segments are arranged around a central pith (the central part of the stele).

4. **Structure of the Vascular Bundles:**
- The vascular bundles consist of xylem (which conducts water) and phloem (which conducts food). In dictyostele, these bundles are arranged in a way that they form a longitudinal series around the central pith.

5. **Conclusion:**
- Therefore, the statement that "the stele of Dryopteris is dictyostele" is true, as it accurately describes the arrangement of vascular bundles in this plant.