Although none occur within 200 miles of Tulsa, my lab has presented evidence for significant concentrations of mountain cedar pollen being carried to Tulsa by prevailing southerly winds. Research in my lab has also focused on the identification of the specific allergenic proteins in mountain cedar pollen and related species of conifers. In addition to being very allergenic mountain cedar pollen is also unique due to the time of pollen release. Pollination occurs during December and January often with the peak occurring the last week of December.
Plants produce abundant pollen that is easily dispersed by wind as the photo below shows.
Mountain cedar trees in the Arbuckle Mts. of south-central Oklahoma releasing pollen.