where are pollen grains produced in a flower
Pollen Pollen is produced in the microsporangia in the male cone of a conifer or other gymnosperm or in the anthers of an angiosperm flower. Pollen grains come in a wide variety of shapes, sizes, and surface markings characteristic of the species (see electron micrograph, right). Pollen grains of pines, firs, and spruces are winged. The smallest pollen grain, that of the forget-me-not (Myosotis spp.),[which?] is around 6 µm (0.006 mm) in diameter.[citation needed] Wind-borne pollen grains can be as large as about 90–100 µm.[3]