Mountain Big Sagebrush, Vasey Sagebrush
Artemisia tridentata ssp. vaseyana
Synonym: Artemisia tridentata var. vaseyana
The flat-topped upper surface of mountain big sagebrush as seen along the Ironstone Trail #1141 between Cash Prairie and Burnt Mt, William O. Douglas Wilderness.........July 25, 2015.
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Mountain big sagebrush observed along the Pacific Crest Trail between Mt. Ashland and Grouse Gap, Rogue River-Siskiyou National Forest........October 15, 2019.
The photo above shows mountain big sagebrush
as seen on the south-facing slopes of the Ridge of Wonders at the southeastern
corner of Mt. Adams..........July 30, 2005. This species may be
found at this location between the elevations of 5500-6500', with the bulk of
the plants below 6000'.
The photo above shows mountain big sagebrush
as seen on the south-facing slopes of the Ridge of Wonders at the southeastern
corner of Mt. Adams...........July 30, 2005. Subspecies vaseyana
can be identified in part because the top of the shrub appears fairly flat.
The
photo above shows the south-facing slopes of the Ridge of Wonders on Mt. Adams
with numerous mountain big sagebrush visible with its silvery blue-green foliage
and emerging, erect inflorescences evident here. Note the numerous sagebrush
on slopes in the distance. In addition, a large quantity of Artemisia douglasiana grows alongside the big sagebrush. The lupine seen here is Lupinus
sericeus ssp. sericeus var. flexuosus. The yellow flowers
are Hieracium scouleri.
Paul Slichter