The article characterizes the biomorphological and ecological properties of wild ornamental plants in the Guba-Gusar region of the Greater Caucasus. The analysis of the biomorphological spectrum revealed 51 species (29.6%) of rhizomatous polycarpics, 20 species (11.6%) of taproot monocarpics, 9 species (5.3%) of taproot polycarpics, 4 species (2.3%) of rhizomatous monocarpics, 19 species (11.1%) of tuber-root polycarpics, 20 species (11.6%) of bulbous polycarpics, 22 species (12.8%) of fibrous monocarpics, 8 species (4.6%) of trees, 10 species (5.8%) of shrubs, 5 species (2.9%) of tall shrubs or low-growing trees, 4 species (2.4%) of shrubby liana. Also registered are groups of biomorphs by the position and method of protecting renewal buds in an unfavorable period (cold or dry), including phanerophytes (28 species, 16.2%), hemicryptophytes (65 species, 37.8%), cryptophytes (57 species, 12.8%), therophytes (22 species, 12.8%). Among the ecological groups, the mesophytes dominated with 123 species (71.6%). In the flora of the Guba-Gusar region, three invasive species Ailanthus altissima (Simarobuaceae), Robinia pseudoacacia (Fabaceae) and Acalypha australis (Euphorbiaceae) occur, two of which, A. altissima and R. pseudoacacia, we supposed as intentionally introduced due to their decorative properties.