alnus rubra

Forest economics: Why are fallen alder leaves still green?

Most of the leaves on the ground are brown, yellow, or other fall colors. Why are many alder leaves still green?

Snow after Memorial Day?

It’s the end of May. Have you noticed snow swirling in the air and starting to accumulate along the edges of roads?

Billions of maple flowers are bursting open near you

Have you ever heard of maple flowers? Would it surprise you that billions are opening in your neighborhood right now?

Which one is native to the Pacific Northwest?

Three of these might be found on your dinner table. The other is a native tree of the Pacific Northwest. Which are which?

After Snowpocalypse, how are the trees doing?

Here in the Pacific NW, we had an uncommonly cold and snowy February. Did this affect the new buds on trees and shrubs?

In the fall, why are alder leaves on the forest floor still green?

In the fall, leaves on alder trees remain stubbornly green, even after they fall to the forest floor. This is because alder trees do not remove the green chlorophyll from the leaves before sending them to "recycling." Why not?