Pollinosis, or hay fever, makes people miserable around the world, and Japanese cedar (Cryptomeria japonica) pollen is a significant cause of the suffering in the 38.8% of Japanese people who are allergic. Japanese cedar is also the country’s most important timber species. A single mature tree produces on the order of three hundred million grains of pollen.
Click here for original story, Creating pollen-free trees to combat hay fever
Source: Phys.org