Grass pollen, taken on  6.26.02. Single germination pore is difficult to see on the left side of      

        each pollen grain. Photo taken at 1000x. Allergenic material is inside the pollen grain.

        Weed pollen, taken on 6.26.02. Several germination pores are visible, characteristic of weed pollen.

        1000x.

        Grass pollen, with germination pore on the left. Mold spore above at the top.

        Mold spores at 1000x. Taken on 6.26.02. Much smaller than the pollen grains.

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