Pacific NW

What are those tiny brown cones that are covering my driveway?

I’ve been sweeping zillions of tiny, brown, cone-like structures off of my driveway. They are male pollen cones from Douglas-firs, Pseudotsuga menziesii.

Maple seeds: nature's helicopters

This is the season that winged seeds of maple trees helicopter down to the ground. What advantage do the whirling seeds provide to maple trees?