Stigma (botany) Stigma (botany) The stigma (plural: stigmata) is the receptive tip of a carpel, or of several fused carpels, in the gynoecium of a flower. The stigma, together with the style and ovary comprises the pistil, which in turn is part of the gynoecium or female reproductive organ of a plant. The stigma forms the distal portion of the style or stylodia. The stigma is composed of , the cells which are receptive to pollen. These may be restricted to the apex of the style or, especially in wind pollinated species, cover a wide surface. The stigma receives pollen and it
Institute of Botany, Chinese Academy of Sciences systematic and evolutionary botany, vegetation and environmental change, plant molecular physiology and development, photosynthesis, and the sustainable use of plant resources. IB-CAS comprises five research units: the National Key Laboratory of Systematic and Evolutionary Botany, the National Key Laboratory of Vegetation and Environmental Change, the CAS Key Laboratory of Molecular Physiology, the CAS Key Laboratory of Photobiology and the CAS Key Laboratory of Plant Resources. In addition, it is also home to the largest herbarium in Asia, 10 field stations, the Beijing Botanical Garden and the Hua Xi Subalpine Botanical Garden in Sichuan Province. IBCAS’s herbarium collections comprise 2.63 million