Cross Pollination - Vectors
Wind
- Examples: many trees (walnut, pecan, hazelnut, birch) & grasses (sweet corn) - not showy flowers
- Extreme excess pollen production
- Hazelnut: 250,000 pollen grains / ovule (remember apple - 7,000 / ovule)
- For seed production - 1 mile isolation needed
- Examples: beet, corn, spinach