Linked from
The 15 pages that link to Phaseolus vulgaris, each with the reason it gives.
Kidney beanNarrower topic: Kidney beans are a cultivar group within this species.
Green beanNarrower topic: Green beans are immature pods of this species.
Navy beanNarrower topic: Navy bean is one cultivated seed type within this highly varied species.
Pinto beanNarrower topic: Pinto beans are one seed variety of this species.