Life … Plants Vascular Plants Dicots Legumes, Milkworts, and Allies Legumes Sweet Peas and Vetchlings Sulphur Pea Lathyrus sulphureus sulphureus variety Lathyrus sulphureus sulphureus Lathyrus sulphureus sulphureus Key traits Layer Vines Plant type Perennial Vine Wildflower From USDA PLANTS. Close