The Department was established on weakly terraced Northern slope on 14 hectare area in 1939. The area of 3 hectare was remained untouched, in the form of natural Kolkheti Reserve forest, whereas the remaining part was allocated to introduced plants of Caucasus flora. During projecting, cultivation of the forest-parks was planned, being floristically closet to natural, Kolkheti forest, with composition of ligneous as well as grassy species. Five land plots were singled out: 1. Coniferous (upper part of the department); 2. Leafy forest of the lower strip leafy forest of the lower strip (in the middle part); 3. Leafy forest of the lower strip, being basically represented in the form of reserves; 4. Berry-field fruit bordering the forest and being spread on the whole territory; 5. Small size land plots in the riverside lowlands, for the representatives of seaside marshy and sandy flora.
At the end of 70s of previous century, testing-demonstration land plot of rare plant species was allocated in the phyto-geographic department, where only rare and vanishing, as well as grassy species are foreseen. Initially, main aim of forming this land plot was popularization and study of boil-ecological peculiarities. The following plants were planted on this land plot: Quercus imeretina, Q. Castaneifolia, Q. Dzhorochensis, Q. Hartwissiana, Parrotia persica, Ostrya carpinifolia.
Currently, 12 sections are identified in the Phyto-geographic departments; incorporating 367 species (83 – ligneous) of 216 sub-families of 96 families of the Caucasus Eco-region wild flora are represented, among them the following 11 species: Abies nordmanniana, Buxus colchica, Taxus baccata, Zelkova carpinifolia. Alnus glutinosa, Corylus avellana, Diospyros lotus, Ficus carica, Picea orientalis, Pterocaria pterocarpa, Vitis vinifera are included in the list of International Union for Conservation of Nature (IUCN).
The following 8 species: Betula medwedewii, Rhododendron ungerni, Rhododendron smirnowii, Minuartia colchica, Scabiosa adzharia, Quercus pontica, Rhamnus imeretina are recommended for Caucasus Red List.
Sixteen species of Georgian Red List (2006): Betula medwedewii, Buxus colchica, Castanea sativa, Laurus nobilis, Osmanthus decorus, Ostrya carpinifolia, Pterocarya pterocarpa, Quercus hartwissiana, Quercus imeretina, Quercus pontica, Rhododendron smirnowii, Rhododendron ungernii, Staphylea colchica, Taxus baccata, Ulmus glabra, Zelkova carpinifolia.
Five species from the CITES list of the species of wild fauna and flora: Cyclamen adzharicum, Galanthus alpinus, G.krasnovii, G.rizehensis da G.woronowii.
30 endemic species: from which 5 Caucasus (Albizzia julibrissin, Gleditschia caspia, Parrotia persica, Solidago virgaurea, Helleborus caucasica), 2 Georgian (Galanthus woronowii, Dianthus ketzkhowelii), 9 Kolkheti (Aristolochia pontica, Betula medwedewii, Symphytum grandiflorum, Minuartia colchica, Quercus pontica, Iris lazica, Stachys trapezuntae,Paeonia macrophyllum), 10 Ajara-Lazeti (Galanthus krasnovii, G.rizechensis, Seseli foliosum, Rhododendron ungernii, R. smirnowii, Astragalus adzharicus, Quercus dschorochensis, Osmanthus decorus, Primula megasaefolia, Cyclamen adzharicum), 3 Ajara (Allium adzharicum, Centaurea adzharica, Ficaria popovii).
The vegetation of inside-mountainous Ajara and Hirkarni (Azerbaijan) are widely represented on larger part of the phyto-geographic department. The fragments of unique virgin forest of the third geological period rich with relic species is particularly noteworthy, being rarely met elsewhere preserved and well-protected under natural conditions. The samples of the beech, chestnut, and other ligneous trees of more than 100-300 year old are also met there. Therefore, a unique natural vegetation of this department is of great scientific-research, eco-educational and visual importance.