scholarly journals An update of G.K. Merrill's 1909 "Lichen notes no. 14"

Mycotaxon ◽  
2020 ◽  
Vol 135 (2) ◽  
pp. 333-337
Author(s):  
Steven B. Selva ◽  
R. Troy McMullin
Keyword(s):  
Morphological Variation ◽  
North American ◽  
The North

G.K. Merrill proposed three new Calicium taxa that have largely been absent from North American lichen literature since their publication in The Bryologist in 1909. Calicium obscurum [≡ Chaenotheca obscura], which colonizes the basidiocarps of Trichaptum abietinum, predates the use of Chaenotheca balsamconensis. Calicium minutissimum was reintroduced as a member of the North American calicioid biota in 1999. Calicium curtisii var. splendidulum [as "splendidula"] is within the range of morphological variation of Phaeocalicium curtisii and does not warrant varietal status.

The systematics of Ranunculus gmelinii and R. hyperboreus in North America

1974 ◽  
Vol 52 (7) ◽  
pp. 1713-1722 ◽  
Author(s):  
Peter J. Scott
Keyword(s):  
Phenotypic Plasticity ◽  
North America ◽  
Morphological Variation ◽  
North American ◽  
Growth Conditions ◽  
Controlled Growth ◽  
The North ◽  
Representative Material

A consideration of the taxonomy of Ranunculus gmelinii DC. and R. hyperboreus Rottb. is presented. The role of phenotypic plasticity is indicated as a factor contributing to the range of morphological variation in these species and to the confusion found in their taxonomy. The present work, by a reexamination of representative material collected throughout the North American range of the species, and the use of controlled growth conditions, has suggested new limits for the species. This has resulted in modifications of the descriptions of the species and (or) the reduction of taxa to synonymy.Ranunculus hyperboreus Rottb. var. turquetilianus Polunin has been made a synonym of R. gmelinii DC.; R. natans C.A. Mey. var. intertextus (Greene) L. Benson has been made a synonym of R. hyperboreus Rottb.

scholarly journals Ecological determinants of clinal morphological variation in the cranium of the North American gray wolf

2013 ◽  
Vol 94 (6) ◽  
pp. 1223-1236 ◽  
Author(s):  
F. Robin O'Keefe ◽  
Julie Meachen ◽  
Elizabeth V. Fet ◽  
Alexandria Brannick
Keyword(s):  
Morphological Variation ◽  
North American ◽  
Gray Wolf ◽  
The North

1588: The Bicalutamide Early Prostate Cancer Program: Findings of the North American Trial at 7.7 Years' Median Follow-Up

2006 ◽  
Vol 175 (4S) ◽  
pp. 511-512
Author(s):  
David G. McLeod ◽  
Ira Klimberg ◽  
Donald Gleason ◽  
Gerald Chodak ◽  
Thomas Morris ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
North American ◽  
Early Prostate Cancer ◽  
The North ◽  
Cancer Program

Endoscopic Skull Base Surgery Practice Patterns: Survey of the North American Skull Base Society

2013 ◽  
Vol 74 (S 01) ◽  
Author(s):  
Pete Batra ◽  
Jivianne Lee ◽  
Samuel Barnett ◽  
Brent Senior ◽  
Michael Setzen ◽  
...  
Keyword(s):  
Skull Base ◽  
North American ◽  
Practice Patterns ◽  
Skull Base Surgery ◽  
Endoscopic Skull Base Surgery ◽  
The North
Sign in / Sign up

Export Citation Format

Share Document