1. Baghali, Z., Majd, A., Chehregani, A., Pourpak, Z., Ayeriana, S.M., Vatanchian, b. 2011. Cytotoxic effect of benzo(a)pyrene on development and protein pattern of sunflower pollen grains. Toxicological & Environmental Chemistry Vol. 93, No. 4, 665–677.

2. Chehregani, A., Mohsenzadeh, F. 2015. Developmental stages of pollen and ovule in Anthemis odontostephana Boiss. Cv. Odontostephana. Plant researches journal. 27 (4): 544-556.

3. aCountry Mapping Organization, Presidency. 2019. Determining the boundaries of Tehran province. https://www.ncc.gov.ir/fa/gallery/

4. bCountry Mapping Organization, Presidency. 2019. Determination of latitude and longitude of Tehran province. https://www.ncc.gov.ir/images/docs/files/

5. Endress, S. K. 1994. Diversity and Evolutionary Biology of Tropical flowers. Cambridge Univ. Press, New York, NY.

6. Erthman, G. 1960. The acetolysis method. A revised description. Svensk Botanisk Tidskrift. 54: 556-564.

7. Fathy Azzazy, M. 2016. Environmental Impacts of Industrial Pollution on Pollen Morphology of Eucalyptus globulus Labill. (Myrtaceae). Journal of Applied Biology & Biotechnology. 4 (05): 057-062. Available online at http://www.jabonline.in

8. Havlis, M. 2016. Plants: Yucca filamentosa - Adam's needle. https://www.about-garden.com/a/en/8774-yucca-filamentosa-adam-s-needl

9. Jeong, N-R., Park, K-Y. 2022. Rose pollen management methods to improve productivity. Agronomy, 12(6), 1285; https://doi.org/10.3390/agronomy12061285.

10. MaMajd, A., Rezanejad, F., Moein, M., Aminzadeh, M., Shariatzadeh, S.M.A. 2002. Effect of air pollution on anther and pollen development and their allergenicity in Tagetes patula, Asteraceae. Journal of Science . 1(34):179-192.

11. Malik, S., Rather, Z.A., Ahmad Wani, M. & et al. 2017. Effect of Growth Regulators on Plant Growth and Flowering in Dahlia (Dahlia variabilis) cv. Charmit. J of Exper. Agri. Int. 15(3):1-7. DOI: 10.9734/JEAI/2017/32007.

12. Matiashuk, R.K., I. V. Tkachenko. 2021. The Pollen of Plants of the Shrub Layer in the Urban Green Space as an Indicator of the State of Atmospheric Air of the City (on the Example of Representatives of the Genus Forsythia). Visnyk of V. N. Karazin Kharkiv National University series «Еcоlogy». 25. https://periodicals.karazin.ua/ecology/issue/view/1112

13. aMissouri Botanical Garden. Ageratum houstonianum. https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?tax onid=277131

14. bMissouri Botanical Garden. Tagetes patula. https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=a611.

15. Monitoring system of the country's air quality. https://aqms.doe.ir/home/AQI.

16. Mozaffarian, V. 1998. Dictionary of Iranian Plant Names. ISBN: 964-5545-40-4. 739p.

17. OASH. Office of climate change and health equity. Climate and health outlook. https://www.hhs.gov/sites/default/files/climate-health-outlook-march-2023.pdf

18. Rezanejad, F. 2007. The effect of air pollution on microsporogenesis, pollen development and soluble pollen proteins in Spartium junceum L. (Fabaceae) Turkish Journal of Botany 31 (3), 183-191.

19. Shirkhani, Z., Chehregani Rad, A., Gholami, M. 2020. Effects of cadmium on perianth and anther formation in Datura stramonium L. Brazilian Journal of Botany. 43: 239–246.

20. Traidl-Hoffmanna, C., Kaschea, A., Menzelb, A., Jakoba, Th., Thiela, M., Ring, J., Behrendta, H. 2003. Impact of Pollen on Human Health: More Than Allergen Carriers? Int Arch Allergy Immunol. 131:1–13.

21. Ullmann, H.F. 2008. Botanica's Pocket: Annuals & Perennials. Publisher: h. f. ullmann; 1st edition 2008. ISBN-13‏: ‎ 978-0841602625.

22. Vasilevskaya, N. 2022. Pollution of the Environment and Pollen: A Review. Stresses. 2(4), 515-530; https://doi.org/10.3390/stresses2040035.

23. Zhang, Y., Steiner, A. 2022. Projected climate-driven changes in pollen emission season length and magnitude over the continental United States. Nature Communications. https://www.nature.com/articles/s41467-022-28764-0