The guide "Was blüht denn da - Das Original" offers a comprehensive guide to identifying over 870 flowering plants. With more than 2,000 lifelike illustrations and a proven classification by flower color and shape, this work enables quick and precise identification. The new edition combines traditional print media with modern technology by providing access to exclusive online content and the award-winning identification app "Flora Incognita" via a code. In addition, important identification features are highlighted with indicator arrows, while similar species and detailed drawings of flowers, leaves, fruits, and roots support a well-founded differentiation. The guide also contains information on common trees, shrubs, and grasses, making it an ideal companion for nature explorations. The updated edition, released on the occasion of the classic's 90th birthday, impresses with its extensive information and the integrated plant quiz in the KOSMOS-PLUS app. This standard work is an indispensable reference for anyone passionate about flora and looking to deepen their knowledge in plant identification.