Pisum sativum subsp. sativum

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1981, Flora Europaea. Volume 2. Rosaceae to Umbelliferae, Cambridge University Press : 143

(a) Subsp. sativum (inch P. arvense L. ): Racemes shorter than or only slightly exceeding the leaves; corolla white to purple; seeds globose or somewhat angular, smooth or rugose. Widely cultivated and sometimes naturalized, particularly in S. Europe.