This bean ecotype flourishes in the extremely favorable microclimate a few kilometers from Potenza, around Lake Pantano di Pignola. A large basin, surrounded by the Maddalena mountains, which are over 1,000 meters high, forms a kind of natural amphitheater. Temperatures in July, August and September never exceed 30°C, while the relative humidity is around 70%. The soil is also perfect for growing beans, well drained and highly productive due to its clayey-silty composition. The climbing plant produces a round, ovoid seed, beige in color with the dark red streaks that give it its name. After the Second World War, bean growing was replaced by livestock farming and young people gradually abandoned the countryside and went to work in the cities or the chemical industry that developed in the area.
The harvest runs from around the first week of September (for fresh beans) to the beginning of October (when they are collected dry to be shelled).