![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]. This image is in the public domain. https://remf.dartmouth.edu/images/botanicalPollenSEM/source/12.html](https://www.ceramicforms.com/wp-content/uploads/louisa_howard_pollen_mix.jpg)
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]. This image is in the public domain. http://remf.dartmouth.edu/images/botanicalPollenSEM/source/12.html