Common Ray Grass (Lolium perenne), Perennial ryegrass, Fig. 13, Pl. XIII, after p. 828, R.W. Dickson: Practical agriculture, or, a complete system of modern husbandry: with the methods of planting, and the management of live stock. Bd. 2. London: printed for Richard Phillips; by R. Taylor and Co., 1805.
Common Ray Grass (Lolium perenne), Perennial ryegrass, Fig. 13, Pl. XIII, after p. 828, R.W. Dickson: Practical agriculture, or, a complete system of modern husbandry: with the methods of planting, and the management of live stock. Bd. 2. London: printed for Richard Phillips; by R. Taylor and Co., 1805