threat to the biodiversity of rocklands. Artemisia semi-desert is the most characteristic habitat of the whole arid zone, where the reservation is situated. Artemisia semidesert supports extremely dry-resistant and heat-resistant generalist species. Here one can encounter associations of Artemisia fragrans with different saltworts (Salsola ssp). Habitat of Tertiary Clay Semi-desert; is pretty narrow spread, and usually associated with rocky outcrops. This habitat is poor in biodiversity, It supports a number of saltworts, as well as endemic plant Scorzonera gorovanica and beautiful fritillaria Rhynopethalum gibbosum. Humid habitats around streams and urban lands; look like a green oases. These habitats support some diversity of Tamarix species, different wild and domesticated crops, as well as amphibians and striped lizards. "Sandy Desert/Semi-desert Habitats"; support very specific psammophilic organisms. Many of psammophilic organisms are very sensitive to changes in depth and mechanical composition of the soil. Flora The reservation supports about 160 species of vascular plants from 125 genera and 39 families (Tadevosyan, 2001, 2002). This diversity includes 12 Red List species: Dianthus libanotis (Caryophyllaceae), Salsola tamamschjanae (Chenopodiaceae), Calligonum polygonoides (Polygonaceae), Acantholimon araxanum (Plumbaginaceae), Astragalus massalskii, Astragalus paradoxus (Fabaceae), Thesium szovitsii (Santalaceae), Neogallonia szovitsii (Rubiaceae), Eremostachys macrophylla (Lamiaceae), Fritillaria gibbosa, Tulipa biflora (Liliaceae), Iris iberica subsp. lycotis (Iridaceae). The gems of the sandy habitat are phog (Calligonum polygonoides), milfoil (Achillea tenuifolia), spurge, Kochia prostrata, Noaea mucronata, (Euphorbia marschalliana),Astragalus paradoxux, Ziziphora tenuior, Ceratocarpus arenarius, Oligochaeta divaricata and numerous other psammophyte species. 'Sands of Goravan is the only place in Armenia where relict phog (Calligonum polygonoides), and Fritillaria gibbosa occur. It is a leafless perennial shrub with dense white and green branches up to 1m long. Its roots are important for preventing sand movement. Phog is ecologically tied to one of endemic insect species of Armenia occurring in Goravan sands - Pharaonus caucasicus butterfly. Local people collecting roots and branches of the phog and use it as fuel. Also phog is intensively grazed by domestic goat and sheep. Another notable species is the milfoil (Achillea tenuifolia) which usually grows up to 80 cm. This species is very common for xerophyte associations of the Ararat plain, particularly in sandy semi-desert. Native communities collect milfoil and use it for preparation of food. Milfoil is usually surrounded by numerous ant hills. Ants are vitally tied to this as well as other sand species. Links between ants and myrmecophilous species (Euphorbia marschalliana, Oligochaeta divaricata, Ziziphora tenuior, and Ziziphora persica) are not