Grenen, hout gravures, gepubliceerd in 1897 - Stockillustratie

Pines, left side: Scots pine (Pinus silvestris). Right side: 1 - 6) Scots pine (Pinus silvestris); 7 - 9) Mountain pine (Pinus mugo, or Pinus montana); 10 - 12) Black pine (Pinus nigra, or Pinus Laricio); 1, 7, 10) Shoot tips with male catkins; 2, 8, 11) Shoot tips with female catkins; 3) Male inflorescence; 4) Female inflorescence; 5, 9, 12) Cones; 6) Seed scale with two seeds. Wood engravings, published in 1897.