From a news story on Denver’s channel 9:

BOULDER, Colorado — Police officer Mike Pease can tell the difference between tulips and marijuana.
Pease plucked a handful of marijuana plants from a tulip garden on the Pearl Street Mall as dozens of passersby watched. While Pease spent 10 minutes weeding out the weed, pedestrians pulled out cameras and snapped pictures.

“It will be placed into property and evidence and labeled for destruction,” Pease said. “We don’t know who the owner is, so no charges will be brought against anybody,” said Pease.

“This is so funny. This is hilarious. This is so Boulder,” said Erika Kriksciun, a graduating senior at Boulder Fairview High School.