The coloring is particular and the ecotype has been named after this feature: the bean is half white and half violaceous, as if the latter part was a hat (in Italian, cappello) covering the seed.
The plant is creeping and its height, with indeterminate growth, is linked to the kind of tutor used. It also depends on the competition between apex and seed, particularly off balance and favoring the latter in the final stage of the plant life cycle. The leaves are trilobate, with heart-shaped very small leaves, in particular the lateral ones. The flowers are papilionaceous, white in the first flowering stage and tending towards yellow after fecundation; the fruit is a green pod tending towards yellow when ripe. It does not carry more than 5 seeds, and usually there are 4 seeds. The cultivation of Cappellette Bean of Vallepietra takes place in a territory rich in water and with a particularly favorable mountain climate for this species. Sowing with 5-7 seeds per hole with a sowing distance of 70 cm among the rows, 50/60 cm along the same row.