The image is a diagram that shows the sequence of classes in a classroom. It is divided into four sections, each representing a different class. 

The first section is labeled "Algues", which is the name of the class. The second section is titled "Cryptogames", which translates to "Lichons" in English. The third section is labelled "Champions" in French. The fourth section is called "Eudocots", which means "Eucalyptus". The fifth section is numbered "Alges" and shows the number of algues in each class.

Each section has a label with the corresponding class name and a brief description of the classification. The labels are arranged in a grid-like pattern, with each class represented by a different color. The background of the image is white, and there is a small emblem on the top right corner that reads "Schème de séquence de classement futur herbier".

Overall, the diagram appears to be a visual representation of the different classes in the classroom.