Penstemon flavescens

Plant Information
Species: 
flavescens
Species Authority: 
Pennell
Subgenus: 
Penstemon
Section: 
Penstemon
Subsection: 
Proceri
Habit:
 
herbaceous perennial
Habit Woodiness:
 
herb
Lifespan: 
long-lived
Plant Height - Min: 
1.50dm
Plant Height - Max: 
4.00dm
Habitat Description: 
Coniferous forest openings, mesic meadows.
Distribution Range: 
Alpine slopes of the Bitterroot Mountains of western Montana and northern Idaho.
Elevation - Min: 
1980.00m
Elevation - Max: 
2450.00m
Common Name: 
Yellow Beardtongue
Other Notes: 

Penstemon flavescens is a narrowly endemic hexaploid species that is thought to have arisen through amphiploidy. Because of the morphological similarity, one suspected parent is P. confertus, a tetraploid, but flavescens has acquired several characters that could not have come from that source, such as the boat-shaped anther-sacs, the black-drying foliage, the staminode bearded farther back from the apex, and the dilated corolla. The other parent is unknown.

Photos by Andi Wolfe ©2014 - If you would like to use any of these photos, contact Andi Wolfe at Ohio State University

First Bloom: 
June
Last Bloom: 
August
Chromosome Number: 
2n = 48
References: 
Keck DD. 1945. Studies in Penstemon no. 8: a cyto-taxanomic account of the section Spermunculus. American Midland Naturalist. 33(1):128-206.