Pollen Corona by a False Acacia
In Japan, pollen coronae are normally caused by ceder pollen (and possibly Japanese cypress pollen). However, a pollen corona by a false acacia is observed by Mr. Yasuike on May 25th 2006, in Matsumoto. He said that an amount of false acacia pollen is quite large in this season around Matsumoto (it is not typical for the other areas in Japan).
It might be the first report of a pollen corona in Japan, other than by ceder (or cypress) pollen.
[Posted by Yuji Ayatsuka]