Aargh, I can't keep track of the penstemons I grow - especially since more than half of them were grown from mis-identified seed. This nice one is growing in the top section of my rock garden, where according to my records I have placed (at various times) P. procerus, P. neomexicanus, and P. serrulatus. This doesn't appear to be any of those, although P. neomexicanus looks somewhat close (but that one shouldn't be blooming yet, according to the APS site). Any penstemaniacs here with an educated guess as to what I have on my hands?
