Geomorphological nature monument Crveno jezero is located near the town of Imotski, in the submediterranean vegetation zone. The research area included different habitats: forests, shrubs, dry rocky habitats, open rocks and screes. On all types of habitats the total flora was collected and its structure, ecological characteristics and life strategies were described. A total of 149 species were found in 52 families, most of which were Asteraceae and Fabaceae (both 8,7 %), and Lamiaceae and Poaceae, both represented by 8,1 % in the total number of species. Of the total number of taxa, the most common plants are Mediterranean and South – European floral elements. The most abundant taxa are thermophilic and heliophytic species, and according to continentality most taxa belong to the subcontinental type. Most of the recorded taxa are adapted to dry soil, and the species more adapted to humid soil were most commonly observed in forest habitats. Mean values of ecological indicator values prevail for the amount of humus, soil airiness and nitrogen content, and generally, the plants prefer neutral to basic pH values. In the spectrum of life forms, hemicryptophytes and phanerophytes prevail, and vegetative reproduction is present in 100 species. Average CSR values show the dominance of competitive and stress-tolerant strategy. A total of 90 species are adapted to entomophily, while dominant methods of seed dispersal include zoochory (88 taxa) and anemochory (74 taxa). Fifteen law-protected taxa were found, most of which are Illyrian – Adriatic and Illyrian – Balkan endemics.