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
Discodermia calyx Discodermia calyx Discodermia calyx are bowl-shaped sponges that are found in shallow waters in central and southern Japan. These sponges are distributed by the central Kuroshio current and are therefore localized along this current. Like many other sponges, "D. calyx" are very porous. They use the pores in their outer walls to draw in water which they then expel, retaining the nutrients dissolved in the water to nourish themselves. To keep water flowing in and out, the flagella that line their pours beat in either direction. The sponge is most known and used for a molecule that can be extracted