Examples of polyploid plants in nature?

There are several examples of polyploid plants in nature. Some of them include:

1. Wheat: Many cultivated varieties of wheat are polyploid, such as hexaploid bread wheat (Triticum aestivum), which has six sets of chromosomes.

2. Cotton: Several species of cotton, including upland cotton (Gossypium hirsutum) and Pima cotton (Gossypium barbadense), are polyploid.

3. Potatoes: Many cultivated varieties of potatoes (Solanum tuberosum) are polyploid, with tetraploid (four sets of chromosomes) and hexaploid (six sets of chromosomes) forms being common.

4. Oats: Cultivated oats (Avena sativa) are often polyploid, with tetraploid and hexaploid forms being found.

5. Apples: Some apple varieties (Malus domestica) are polyploid, with triploid (three sets of chromosomes) and tetraploid forms being common.

6. Bananas: Most cultivated bananas (Musa spp.) are polyploid, with triploid and tetraploid forms being found.

7. Ferns: Many fern species are polyploid, with examples including the common bracken fern (Pteridium aquilinum) and the lady fern (Athyrium filix-femina).

8. Strawberries: Some cultivated strawberries (Fragaria spp.) are polyploid, with octoploid (eight sets of chromosomes) forms being common.

These are just a few examples, and polyploidy is actually quite common in the plant kingdom. It is estimated that around 70% of flowering plants have experienced polyploidization at some point in their evolutionary history.