SEM showing a variety of pollen grains.
Uploaded 1.9.2017
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Pollen from a variety of common plants: sunflower [Helianthus annuus], morning glory [Ipomea purpurea], hollyhock [Sildalcea malviflora], lily [Lilium auratum], primrose [Oenothera fruticosa] and caster bean [Ricinus communis].