Nouvelle, Flore, Coloriée, De, Poche, Des, Alpes, Et, Des, Pyrénées, Paris, Klincksieck, 1906-1912, Alps, Plants, Pyrenees, The illustration features two distinct species of gentian flowers. On the left, Gentiana alpina, commonly known as the alpine gentian, showcases its striking blue trumpet-shaped blossoms atop slender, upright stems surrounded by narrow, lanceolate leaves. On the right, Gentiana pyrenaica, or Pyrenean gentian, presents similarly vibrant blue flowers but with a slightly different blossom shape and a more compact growth habit. Both species are typically found in mountainous regions, thriving in rocky and moist environments, making them popular in alpine botanical studies. The caption includes their scientific names and respective habitats, highlighting their ecological significance.