When the C3 GP is higher than the C4 GP ...

you might expect cool-season grasses to dominate. What if the GP for cool-season grass is high for 365 days per year? That's a unique climate that happens at high elevations near the equator. Being close to the equator, the day length doesn't vary much through the year, and temperatures don't change much through the year. And being at the right elevation, the temperatures are cool enough to produce a high cool-season grass GP (C3 GP).

So you may be surprised…