Life forms of plants reflect their adaptability to environmental conditions and are units of the ecological classification of plants that characterize groups with similar adaptive traits. The study of the regional flora and its floristic complexes cannot be complete without an analysis of life forms, an environmental group in relation to moisture, and since this is important for solving both theoretical and practical issues. The flora of the Absheron Peninsula was studied in 2012-2019 and about 890 species belonging to 430 genera, 83 families were recorded. Based on the results, among the life forms grassy polycarpic herbs and hemicryptophytes prevail. According to the location of the families, the spectrum of therophytes mainly coincides with the general spectrum; therefore, the Absheron flora can be called as the theophyte flora. The representative ecological group in relation to moisture in the flora of the Absheron Peninsula is mesophytes. In relation to the intensity of illumination three groups of plants were distinguished: heliophytes, sciophytes, hemiheliophytes. Heliophytes play a dominant role.