[Lupines: The Genus Lupinus in Mt. Adams Country]

Arctic Lupine, Broadleaf Lupine, Cascade Lupine, Subalpine Lupine

Lupinus latifolius var. subalpinus

Synonym: Lupinus arcticus ssp. subalpinus

These lupine do not key well using Hitchcock on Mt. Adams. They are upright, usually with unbranched stems. The stems are solid to slightly hollow. Stem leaves vary from 4 to several more than 8. The margin of the keel is usually, although not always ciliate. The leaflets are largely glabrous and there are some spreading hairs on the calyx, pedicel and stem within the inflorescence. The plants have characteristics of both Lupinus burkei and Lupinus arcticus. I'm currently leaning towards Lupinus arcticus because they are slightly different (leaf shape and shorter stature) from the Lupinus burkei to be found a thousand or so feet lower on Mt. Adams.

Arctic Lupine, Broadleaf Lupine, Cascade Lupine, Subalpine Lupine: Lupinus latifolius var. subalpinus (Synonym: Lupinus arcticus ssp. subalpinus) - Arctic Lupine, Broadleaf Lupine, Cascade Lupine, Subalpine Lupine: Lupinus latifolius var. subalpinus (Synonym: Lupinus arcticus ssp. subalpinus)

Subalpine lupine ? as seen at Island Springs on the eastern slopes of Mt. Adams.............August 12, 2006. All photos on this page were taken at the same time and location.

Flower of Arctic Lupine, Broadleaf Lupine, Cascade Lupine, Subalpine Lupine: Lupinus latifolius var. subalpinus (Synonym: Lupinus arcticus ssp. subalpinus) - Flower of Arctic Lupine, Broadleaf Lupine, Cascade Lupine, Subalpine Lupine: Lupinus latifolius var. subalpinus (Synonym: Lupinus arcticus ssp. subalpinus) - Flower of Arctic Lupine, Broadleaf Lupine, Cascade Lupine, Subalpine Lupine: Lupinus latifolius var. subalpinus (Synonym: Lupinus arcticus ssp. subalpinus)

Close-up views of the flower and calyx of this species. One of the wing petals has been removed from the flower at right so that the keel can be observed. Note the numerous long hairs lining the upper margin of the keel.
Paul Slichter