Life … Plants Vascular Plants Dicots Legumes, Milkworts, and Allies Legumes Sweet Peas and Vetchlings Nevada Sweet Pea Lanszwert's Pea-vine variety Lanszwert's Pea-vine Lathyrus lanszwertii lanszwertii Key traits Layer Vines Plant type Perennial Vine Wildflower From USDA PLANTS. Close