[Clovers: The Genus Trifolium West of the Cascade Mountains of Oregon and Washington]

Burrowing clover as seen at Bayocean Spit at the west side of Tillamook Bay, northern Oregon coast........May 22, 2009.

Close-ups of burrowing clover as seen at Bayocean Spit at the west side of Tillamook Bay, northern Oregon coast.........May 22, 2009.

Burrowing clover as seen at Nob Hill Park in St. Helens, OR........April 3, 2016.

Burrowing clovers in bloom in lawns along the sidewalk near Mount Hood Medical Center, East Stark Street, Gresham, Oregon.......May 8, 2020.