Fragaria" × "bringhurstii is a naturally occurring hybrid species of strawberry native to the West Coast of the United States. The species results from the natural intercrossing of "Fragaria vesca" and "Fragaria chiloensis", native species whose ranges overlap in that region.
Fragaria vesca and Fragaria chiloensis make hybrid strawberries.
The species results from the natural intercrossing of fragaria vesca and fragaria chiloensis which are native species whose ranges overlap in that region.  Because it is in two separate sentences.