Mt. Adams Lupine, Silky Lupine: Lupinus sericeus var. sericeus (Synonyms: Lupinus alpicola, Lupinus buckinghamii, Lupinus fikeranus, Lupinus flavicaulis, Lupinus flexuosus, Lupinus huilcoflorus, Lupinus ramosus, Lupinus sericeus Pursh ssp. sericeus, Lupinus sericeus Pursh var. fikeranus, Lupinus sericeus Pursh var. flexuosus, Lupinus sericeus Pursh var. subflexuosus, Lupinus spiraeaphilus, Lupinus tuckerianus)

Silky lupine. Photographed at Little Mt. Adams..........July 17, 2006. Note the long, narrow leaflets, one of the characteristics of this species.

Silky lupine photographed along the Round the Mt. Trail #9 just west of the junction with the Shorthorn Trail #12, Mt. Adams Wilderness......July 10, 2020.

The photo at left shows silky lupine as seen at about 7100' along the Highline Trail #114 on the northeastern flanks of Mt. Adams........July 24, 2005. Some of the flowers had spurred calyces. The photo at right shows silky lupine as seen along the Round the Mt. Trail at the western edge of Bird Creek Meadows (near Crooked Creek), Mt. Adams........August 13, 2017.

The photo above shows a close-up side view of Mt. Adams lupine as seen along the Highline Trail #114.........July 24, 2005. Note the calyx which is somewhat saccate or spurred, but the banner is well back compared to the wings, which helps identify it as this species rather than spurred lupine.

The photo above shows a close-up dorsal view of Mt. Adams lupine as seen along the Highline Trail #114.........July 24, 2005. Note the numerous hairs on the back of the banner and the split tip on the upper lip of the calyx.

The photo above shows a close-up frontal view of Mt. Adams lupine as seen along the Highline Trail #114.........July 24, 2005. Note the white center to the banner.

The photo above shows a close-up side view of Mt. Adams lupine as seen along the Highline Trail #114..........July 24, 2005. Note the keel which has some ciliate hairs along its margin.

The photo above shows another view of the keel of silky lupine with a denser supply of ciliate hairs lining the top of the keel. Photographed on the Island on the eastern slopes of Mt. Adams...........July 17, 2006.

Silky lupine with Rocky Mt. groundsel (Packera streptanthifolia) blooming at its base. Photographed along the climber's trail along the southern rim of Hellroaring Valley, Mt. Adams...........July 19, 2009.

Silky lupine in bloom at about 6700' in a drainage about three-quarters of a mile uphill from Foggy Flat and about one mile and one-half west of Red Butte, Mt. Adams Wilderness.......August 27, 2020.