Riggin's Penstemon, Whorled Penstemon

The photo above shows a close-up of the flower of whorled penstemon as seen along Washington Highway 129 on the grade down the north side of the Grande Ronde River canyon..........July 7, 2008. Note the very hairy staminode.

The photo above shows a close-up of the flower of whorled penstemon as seen along Washington Highway 129 on the grade down the north side of the Grande Ronde River canyon..........July 7, 2008. Note the very hairy staminode exserted from the mouth of the corola, and the numerous glands covering the outside of the corolla and calyx.

The photo above shows a close-up of the ventral side of a toothed leaf of whorled penstemon as seen along Washington Highway 129 on the grade down the north side of the Grande Ronde River canyon...........July 7, 2008.

The photo above shows a close-up of the dorsal side of a leaf of whorled penstemon as seen along Washington Highway 129 on the grade down the north side of the Grande Ronde River canyon..........July 7, 2008.

The photo above shows a close-up of the toothed stem leaves of whorled penstemon as seen along Washington Highway 129 on the grade down the north side of the Grande Ronde River canyon.........July 7, 2008.

The photo above shows whorled penstemon as seen on cliffs and road cuts along Washington Highway 129 on the grade down the north side of the Grande Ronde River canyon..........July 7, 2008. Note the leaves arranged in whorls of 3-4 within the inflorescence.

The 2 photos above show whorled penstemon as seen on cliffs and road cuts along Washington Highway 129 on the grade down the north side of the Grande Ronde River canyon..........July 7, 2008.

Additional close-up photos of whorled penstemon as seen along the north side of the Grande Ronde River about one mile east of Pitt, WA...........May 24, 2010.

Whorled penstemon as seen on cut banks along the old Lewiston Grade (to the north of Lewiston, ID)...........June 10, 2013.