[Roses: The Genus Rosa East of the Cascade Mountains of Oregon and Washington]

What may be of pioneer rose as seen at the northeastern base of Steptoe Butte where evidently there was once an old homestead........June 22, 2009.

Additional close-up views of the flowers, calyx, leaf and prickles of pioneer rose as seen at the northeastern base of Steptoe Butte where evidently there was once an old homestead......June 22, 2009.

Additional close-up views of Harison's rose as seen along Oregon Highway 218 several miles of Camp Hancock.........May 16, 2010.

Close-ups of the prickles and flowers of pioneer rose as seen at an old homestead above the Klickitat River in the Klickitat State Wildlife Area in south-central Washington........May 31, 2009.

A large cluster of pioneer rose as seen at an old homestead above the Klickitat River in the Klickitat State Wildlife Area in south-central Washington..........May 31, 2009.