MADISON, Wis. (AP) — Police are stumped by the theft of a rare pine tree from the University of Wisconsin Arboretum.

The 25-foot Algonquin Pillar Swiss Mountain pine was sawed down sometime between Nov. 5 and Nov. 9, University of Wisconsin-Madison police said Thursday.

The stolen tree was about 30 yards (30 meters) from a street that runs through the arboretum, which is a popular spot for walkers, joggers, bicyclists and nature lovers.

The tree was planted in 1988, and a twin tree next to it was left unharmed.

However, a company white fir located nearby that was planted in 1981 had a 12-foot...