Arctic Lupine, Cascade Lupine, Subalpine Lupine, Broadleaf Lupine
Lupinus latifolius var. subalpinus
Synonyms:Synonym: Lupinus arcticus ssp. subalpinus
Subalpine lupine as seen at left along the Round the Mountain Trail #9 in Bird Creek Meadows
near 6000' on Mt. Adams.......July 19, 2007. The photo at right shows a late blooming subalpine lupine as seen blooming near 7000' along the climbers trail along Hellroaring Canyon, Mt. Adams, Yakama Nation lands........September 2, 2017..
The uppermost photo shows a close-up sideview of the flower of subalpine lupine. The banner of this species is held fairly upright and is situated behind the midpoint of the wings. The photo at left shows a close-up of the keel of subalpine lupine, which is generally hidden by the wings. The upper margin of the keel may or may not be lined with minute hairs. The photo at center shows a frontal view of the flower of subalpine lupine.
The photo at right shows a view down onto the hairy calyx and glabrous back of the banner of subalpine lupine.
This subset of photos were all taken at 7015' near the base of the southern moraine of the Mazama Glacier on Mt. Adams.
The leaves of subalpine lupine are palmately compound with up to 10 oblanceolate to elliptic-oblanceolate leaflets. Both leaflet surfaces are green with the upper surface glabrous while the lower surface generally is covered with light colored hairs. The petioles of the basal leaves are long petioled, and are often two or more times longer than than the diameter of the blade.
The photo at right shows a close-up of the underside of a leaflet of subalpine leaflet. Notice the minute hairs on the underside of the leaflet which helps differentiate this species from the similar broadleaf lupine
. The stems (including within the raceme) bear a few to many spreading hairs which range from white to reddish in color.
The photo at left shows subalpine lupine as seen along the upper portion of the Divide Camp Trail #112........September 18, 2008. The photo at right shows subalpine lupine still blooming on the banks of the Lewis River at its headwaters at the base of the terminal moraine of the Adams Glacier, Mt. Adams Wilderness.......August 31, 2019.
Two additional photos of subalpine lupine as seen in a small meadow near 6000' along the climber's trail to Mazama Glacier on Mt. Adams.........August 2, 2009. Albino forms of this species (as seen in the photo at right) are occasionally seen in the vicinity of Bird Springs Meadows.
The uppermost photo shows a light and dark color form of subalpine lupine as seen along the Killen Creek Trail #113 near the junction with the Pacific Crest Trail #2000, Mt. Adams Wilderness............August 29, 2012.
Arctic lupine as seen at left along Killen Creek about one-quarter mile below its headwaters, north side of Mt. Adams..........August 13, 2016. Note the white faces of the unpollinated banners. The photo at right shows a late blooming subalpine lupine in bloom along the upper Lewis River near the Pacific Crest Trail #2000, Mt. Adams Wilderness......October 5, 2020.
Subalpine lupine blooming at left in Bird Creek Meadows, Mount Adams........August 1, 2014. The photo at right shows subalpine lupine blooming along the Shorthorn Trail #12 where it crosses the west fork of Morrison Creek, Mount Adams Wilderness.....July 7, 2021.