Ponderosa pine

Lycogala epidendrum, also known as "wolf's milk slime".
Benny Mazur (CC-BY-2.0)

Slime molds are stubbornly mysterious. They are usually lumped in with fungi, but exhibit several traits ordinarily attributed to animals. One of these stands out above the others: slime molds travel.

View of a treated ponderosa pine plot in 2009, twenty-five years after selection cutting and prescribed burning.
Courtesy Carl Fiedler

A new book about ponderosa pine trees, written by a pair of Montana forest researchers, offers insight into past mistakes and current policies.

Ponderosa pine bark
Flickr user Tim Jones (CC-BY-NC-ND)

The bark of any tree is more than just a good-looking facade. Even the most graceful aspen or stately ponderosa requires bark to protect its sensitive inner flesh from disease, parasites, and other environmental stresses, such as fire.

Tree Bark

Jun 20, 2014
Jami Dwyer

6/22/14 & 6/23/14: This week on "Fieldnotes:" "Tree Bark," written by Peter Lesica, read by Anne Garde.