SYN - AND AUTOECOLOGICAL STUDIES IN THE OSTRYA CARPINIFOLIA- AND QUERCUS PUBESCENS - AREA NEAR BOZEN (SÜDTIROL - ITALY). Measurements of leaf diffusion resistance, water saturation deficit and water potential were carried out on Teucrium chamaedrys, Artemisia alba, Helianthemum nummularium ssp. ovatum in a dry grassland community.