Sphagnum beringiense sp. nov. (Bryophyta) from Arctic Alaska, based on morphological and molecular data

Journal Article

A new species of Sphagnum section Subsecunda, S. beringiense, is described from arctic Alaska from the vicinity of Barrow along the northern coast. The species is distinguished morphologically by the light, yellow-green color of the gametophytes, multistratose stem cortex with 2-4 layers of enlarged thin-walled cells, round, medium-size (ca. 5 μm diameter) outer branch leaf pores, scattered inner branch leaf pores, typically few outer stem leaf pores, and abundant, round to elliptic inner stem leaf pores. Two unique plastid DNA haplotypes occur among Barrow area plants of S. beringiense, and these differ by a minimum of three nucleotide substitutions from those of other Alaskan Sphagnum species in the section Subsecunda. Microsatellite markers show that S. beringiense is genetically variable despite the fact that all plants were sampled from within an area of a few km2 and neither gametangia nor sporophytes have been observed. A key to the six Alaskan species of Sphagnum section Subsecunda is provided. © Copyright 2008 by the American Society of Plant Taxonomists.

Full Text

Duke Authors

Cited Authors

  • Shaw, AJ; Andrus, RE; Shaw, B

Published Date

  • 2008

Published In

Volume / Issue

  • 33 / 3

Start / End Page

  • 469 - 477

International Standard Serial Number (ISSN)

  • 0363-6445

Digital Object Identifier (DOI)

  • 10.1600/036364408785679842