> The pollen in my pollen traps started to change from yellow/orange to a
> brown/dark brown pellets.
> The only visible new blooms around are chestnut tree (Castanea sp.) and
> pink/red clover (Trifolium pratense).
Here what we call Dutch white clover (Trifolium repens) gives a brown/dark
brown coloured pollen. Maybe your variety of clover gives the same coloured
pollen.
Trevor Weatherhead
AUSTRALIA
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