[Onions: The Genus Allium East of the Cascade Mountains of Oregon and Washington]

Close-up images of the inflorescence and whole plant of swamp onion as seen at the wildlife viewing area at Logan Valley, Malheur National Forest........July 26, 2011.

Swamp onion as seen as spotted in vernally moist swales where the snow lays late into mid-summer along the Sugarloaf Trail, Sugarloaf Mountain, Wallowa-Whitman National Forest.......July 18, 2019.

Swamp onion in bloom on vernally moist swales at Boeing Field, Ochoco National Forest......June 17, 2019.

A close-up of the inflorescence of swamp onion as seen at a vernally moist bald along the Lick Creek Trail #1809, Hells Canyon National Recreation Area.......July 17, 2019.

Swamp onion as seen on vernally moist soils on a slope uphill to the north of Pisgah Meadows, Ochoco National Forest.........June 13, 2015. This site is on the southern edge of the Bridge Creek Wilderness.