title: Atmospheric pollen counts in Tehran, Iran, 1974.
abstract: Daily pollen counts were made in Tehran by placing a Durham sampler on the roof of the College of Pharmacy building at the University of Tehran. Three pollen seasons were identified in Tehran. Tree season extended from the first week of February through the middle of October. Important pollens of tree season were Willow, Cedar, Sycamore, Pine, Alder, Walnuts, Elm, Cottonwood, Oak and/or Maple, Birch, and Beech. The grass season started from the first week of May and extended into the second week of November. The weed season began at the middle of May and lasted until the last week of December. Important weed pollens belonged to various members of the Order Chenopodials, particularly Burning Bush, and Russian Thistle. Sagebrush and English Plantain were also abundant during the weed season.
mesh_terms: D000397:Air Pollution / Q000032:analysis*; D007492:Iran; D006109:Poaceae; D011058:Pollen / Q000032:analysis*; D012621:Seasons; D014197:Trees