Molecular and morphological evidence for Penstemon luculentus (Plantaginaceae): a replacement name for Penstemon fremontii var. glabrescens

By

Johnson, Robert L
Stevens, Mikel
Johnson, Leigh A
Robbins, Matthew
Anderson, Chris D.
Ricks, Nathan
Farley, Kevin

Type

Article

Date of Publication

2016

Original Publication

PhytoKeys

Volume

63

Pages

47-62

Subjects

Colorado , Penstemon , Piceance , Rio Blanco , White River Shale

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers [2010]-

Identifiers

DOI: https://doi.org/10.3897/phytokeys.63.7952

 

Abstract

Penstemon luculentus R.L.Johnson & M.R.Stevens, nom. nov. replaces Penstemon fremontii var. glabrescens Dorn & Lichvar. The varietal name glabrescens was not elevated because it was already occupied by Penstemon glabrescens Pennell, a different species. This new arrangement is supported by molecular and morphological evidence. An analysis of genetic diversity in populations of both varieties of P. fremontii Torr. & A. Gray (glabrescens and fremontii) from the Piceance Basin, Colorado, using SSR (simple sequences repeats) or microsatellites markers, revealed significant genetic differentiation between the two. Penstemon fremontii var. glabrescens was also genetically different from P. gibbensii Dorn and P. scariosus var. garrettii (Pennell) N.H. Holmgren. The combination of hirtellous stems, glabrous leaves, non-glandular inflorescence, and long anther hairs distinguish P. luculentus from other morphologically similar species.