Tendergreen is an old round bush bean that reaches 6 inches or so at maturity. Dwarf 18 inch vine. Depending on environmental stress, It will show some purple streaking as it reaches maturity. I would suggest that you harvest them before they fill out with beans. It is an antique but still fairly widely grown by home gardeners. Brownish purple seeds. Unless it is obviously a pole bean, I believe you got Tendergreen. It is a traditional snap bean not a filet type.

Tendercrop, as named on the packet, is a dwarf French bean. Looking at the size of the beans you've left them a bit too long unless you intend to grow them for storage. They're most tasty as filets imo. I find the length of the pods varies depending on the weather, the soil and the individual plant. Are these ones you had in the greenhouse? That could see a difference due to fluctuating temperatures under glass. If not, it's incredibly early for French beans. I haven't sown any yet. What you do with them now is eat them!