Penstemon rydbergii A. Nels. ssp. aggregatus (Pennell) Keck
[= Penstemon rydbergii var. aggregatus]
Annotated by Craig C. Freeman, Jul 2010.

Montana: Beaverhead County: Limekiln Canyon, Tendoy Mountains. Elev. 7000 ft.
44.907° N, 112.9056° W; T11S R11W S2
Coordinate Source: TRS-website.
Common in limestone talus at the bottom of a south-facing slope along Limekiln Canyon. With Pseudotsuga menziesii and Cercocarpus ledifolius. Phenology: Flowers.

Peter Lesica 6079, Jul 11, 1993
With Lynn Bacon
MONTU, Accession: 118728