Flowers of cocksfoot grass (Dactylis glomerata). Grass pollen starts to be shed in early spring, and continues until late summer. A single anther of a grass flower may produce in excess of 10,000 pollen grains. This is the tip of a flowering stem, with many individual flowers present. The arrangement of anthers (pale yellow) and filaments (white) ensures that the slightest air movement will cause the open anthers to move and disperse their pollen. Almost all the anthers in this picture have shed their pollen.