This study deals with some physiological and ecological characteristics of Aster spathulifolius Maxim. The transverse geotropism was observed on some of the main stems where the flower bud was initiated. In spite of natural or controlled conditions, lateral shoots grew rosetted on the proximal part of the stem, when flowers were left on the stem. When all flowers were pinched, the lateral shoots on the distal part of the stem grew rosetted in field or 15℃ constant temperature room, while in 20 and 25℃ constant temperatures the flower bud developed on the top of the lateral shoot. The type of the pollen was 3-colporate 6B^b.