Maximum girth is of

Options

A. Sequoia gigantea
B. Eucalyptus regnans
C. Sequoiadendron giganteum
D. Taxodium mucronatum.

Answer

To determine which tree has the maximum girth among the given options, we can analyze each option based on the information provided:

1. **Sequoia gigantea (Giant Sequoia)**:
- Commonly known as the giant sequoia or redwood tree.
- Notable for its large size, with a girth of around 21 meters for some specimens.
- Found in California, specifically the "waterfall tree" is a well-known example.

2. **Eucalyptus regnans**:
- Known as the tallest flowering plant or tree, and the tallest angiosperm.
- It is the world's third-largest tree but does not have the maximum girth compared to others.

3. **Sequoiadendron giganteum**:
- This is actually the scientific name for the giant sequoia (Sequoia gigantea).
- Therefore, it shares the same characteristics as option 1.

4. **Taxodium mucronatum (Montezuma Cypress)**:
- Commonly known as the Montezuma cypress.
- Found in Mexico, it has a trunk girth of over 11 meters.
- It is noted as the world's stoutest tree, indicating it has a significant girth.

**Conclusion**:
Comparing the girth of the trees:
- Sequoia gigantea has a girth of 21 meters.
- Eucalyptus regnans does not have the maximum girth.
- Sequoiadendron giganteum is the same as Sequoia gigantea.
- Taxodium mucronatum has a girth of over 11 meters.

From the analysis, **Sequoia gigantea** has the maximum girth of 21 meters, making it the correct answer.

### Final Answer:
The tree with the maximum girth is **Sequoia gigantea** (Giant Sequoia).

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