Whipple's Penstemon. Broadly distributed on both sides of the Rockies down the US, this should be more widely available. Most commonly with clustered down-turned trumpets of a rich burgundy to purple, different population can also be white or lavender. Very pleasing in all of its forms, this is a good garden plant taking more moisture than a lot of the rock garden Penstemons.
Boechera breweri (syn. Arabis breweri)
Rock garden species originally from seed we collected in the Siskiyous many years ago as Arabis fendleri. Fortunately, we were wrong as we like the pink flowers on breweri much better! Native to the mountains of southern Oregon and northern California, this quite nice in flower and and has both heat and drought tolerance although we wouldn't subject it to hot and humid.
Penstemon pinifolius 'Sunset Glow'
A Plant Select release out of Colorado, this is a vigorous and floriferous selection of the species getting 12"-18" tall and wider. This has myriad tubular, orange flowers that are hummingbird crack which flower for many weeks in summer to early fall. Low water needs, don't kill it with the kindness of rich compost. Another positive is that deer - ours anyway - don't like Penstemon.
(Out of Stock)
Penstemon cardinalis var. regalis
A wild collection from 4450' in Eddy County New Mexico. With stems to 3', the tubular red flowers rank one side of the stem looking very refined. An unspoken secret of the very refined is their dense scruff of golden, decidedly pubic hairs just inside the throat. These catch and transfer pollen while keeping the flower's naughty bits hot, steamy and ready.
(Out of Stock)