Engler and Prantl published a phylogenetic system in the monograph

Options

A. Die Naturlichen Pflanzen
B. Historia Plantarum
C. Species Plantarum
D. Genera Plantarum

Answer

To solve the question regarding the monograph published by Engler and Prantl, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Authors**: Recognize that the question involves two key figures in botany: Adolf Engler and Carl Prantl. They are known for their contributions to plant taxonomy.

**Hint**: Remember the significance of Engler and Prantl in the field of botany.

2. **Understand the Context**: Engler and Prantl worked together on a phylogenetic system, which refers to a classification system based on evolutionary relationships among plants.

**Hint**: Consider how phylogenetic systems categorize organisms based on their evolutionary history.

3. **Review the Options**: The options given are:
- A) Dynaturalism, PFL engine
- B) Historia planterum
- C) Species planterum
- D) Genera planterum

**Hint**: Look for keywords in the options that relate to the work of Engler and Prantl.

4. **Recall the Correct Monograph**: Engler and Prantl published their work in a monograph titled "Die Natürlichen Pflanzenfamilien" (translated as "The Natural Plant Families"), which is often referred to as "Dynaturalism" in some contexts.

**Hint**: Think about the terminology used in botanical classification and how it relates to the names provided.

5. **Select the Correct Answer**: Based on the information, the correct answer is option A) Dynaturalism, PFL engine. This aligns with the known work of Engler and Prantl.

**Hint**: Verify if the chosen option matches the historical context of the authors' contributions.

### Final Answer:
The correct answer is **A) Dynaturalism, PFL engine**.