As I said in Reply 12 above sorry to have 'crashed' this thread but since I did it then I might just as well do it again.
The seedling I pictured in Reply 12 has done quite well (seed SRGC 12/13-2921, sown September 2013, labeled as Penstemon berryi) and I think it is P. newberryi ssp. berryi. In his book 'Penstemons' Bob Nold gives the stamens exserted ("not visible when viewed sideways")