[The Lupines of the Columbia River Gorge]
Silky Lupine or Hybrid Lupine ?
Lupinus sericeus or Lupinus leucophyllus X sericeus ?
The photo above shows a close-up view of a possible hybrid lupine as
seen along the old highway about one mile west of Biggs, OR...............September 29, 2007. Note the open inflorescence, which is more reminiscent of silky lupine (Lupinus sericeus), although banner of the flowers is more directed forward as in velvet lupine (Lupinus leucophyllus) than erect as in the former species.
The photo above shows a close-up sideview of the flower of a possible hybrid lupine seen along the old highway west of Biggs, OR.......................September 29, 2007.
The photo above shows a close-up sideview of the keel and banner of a flower of a possible hybrid lupine seen along the old highway west of Biggs, OR.......................September 29, 2007.
The photo above shows a close-up dorsal view of the back of the banner of a possible hybrid lupine
as seen along the old highway west of Biggs, OR...............September 29, 2007. The upper calyx lobe has been peeled backwards to reveal hairs found on the back of the banner, mostly in a position that would be under the calyx. A few hairs may be found forward of the portion of the banner covered by the calyx on most flowers of this individual plant.
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The photo above shows a close-up side view of the ventral leaf surface (left) and dorsal leaf surface (right) of a possible hybrid lupine found about a mile west of Biggs, OR along the old highway.........................September 29, 2007. Note the dense covering of hairs on both leaf surfaces.
The photo above shows a close-up sideview of the keel and banner of a flower of a possible hybrid lupine seen along the old highway west of Biggs, OR.......................September 29, 2007.
The photo above shows a close-up view of the upper stem leaves and inflorescence of a possible hybrid lupine seen along the old highway west of Biggs, OR.......................September 29, 2007.
Paul Slichter