Penstemon confertus is a plant of meadows and open woods here, according to Flora of Alberta. The common name always throws me, as the numerous plants in my yard, all are white-flowered! I can sometimes imagine a very faintly yellowish tone, but I find it puzzling that the above-mentioned reference refers to the corolla as "sulfur-yellow"... ? What am I missing? ???
It's a very good, long-lived plant here in our cool, dry conditions, though clearly not so flashy as some of the to-die-for blue-flowered penstemons. If one could fault it at all, it is only that the spent flowers turn brown amongst others still in full bloom, but having said that, it is definitely welcome in my garden.