The taxonomic status of Vaccinium boreale

1977 ◽  
Vol 55 (3) ◽  
pp. 281-288 ◽  
Author(s):  
S. P. Vander Kloet
Keyword(s):  
North America ◽  
Taxonomic Status ◽  
Leaf Margin ◽  
Northeastern North America ◽  
Natural Hybrids ◽  
Taxonomic Studies

Two hundred and fourteen specimens of Vaccinium subgen. Cyanococcns were collected from 40 sites in northeastern North America for taxonomic studies. Data collected using various techniques indicate that V. boreale Hall & Aalders should be recognized as a species. Three characters, viz. dimension, pubescence, and leaf margin, separate V. boreale from V. angustifolium and V. myrtilloides. Although the three species are sympatric, only a few natural hybrids between V. boreale and V. myrtilloides have been found among the collected material. Crossing trials between V. boreale and V. pallidum suggest that the two are probable ancestors of V. angustifolium.

The taxonomic status of Vaccinium pallidum, the hillside blueberries including Vaccinium vacillans

1978 ◽  
Vol 56 (13) ◽  
pp. 1559-1574 ◽  
Author(s):  
S. P. Vander Kloet
Keyword(s):  
Plant Height ◽  
Growth Habit ◽  
Taxonomic Status ◽  
Leaf Size ◽  
Single Species ◽  
Leaf Width ◽  
Leaf Margin ◽  
Phenological Data ◽  
Leaf Size And Shape ◽  
Taxonomic Studies

Three hundred and seventy three specimens of Vaccinium § Cyanococcus were collected from 43 sites in eastern North America for taxonomic studies. Data collected using various techniques indicate that the hillside blueberries should be recognized as a single species for which the name Vaccinium pallidum Aiton has nomenclatural priority. Three characters, viz. plant height, leaf width and shape, and leaf margin, separate V. pallidum from V. angustifolium; plant height, growth habit, and leaf width separate V. pallidum from V. corymbosum; while leaf size and shape, glandular indumentum, and calyx pubescence separate V. tenellum from V. pallidum. Although V. pallidum and V. corymbosum are sympatric, only a few natural hybrids have been found among the collected material. Crossing trials among the species yielded experimental phenological data which corroborated the validity of these morphological groups.

Taxonomic status of diploid Salicornia europaea (s.l.) (Chenopodiaceae) in northeastern North America

1987 ◽  
Vol 65 (7) ◽  
pp. 1420-1426 ◽  
Author(s):  
S. L. Wolff ◽  
R. L. Jefferies
Keyword(s):  
North America ◽  
North American ◽  
Taxonomic Status ◽  
Distinct Group ◽  
Salicornia Europaea ◽  
Electrophoretic Variation ◽  
Northeastern North America ◽  
Anther Length ◽  
Length Width ◽  
Diploid Populations

The taxonomic status of diploid Salicornia europaea L. (s.l.) in northeastern North America has been evaluated based on morphological and electrophoretic variation within and between populations. Populations of two European diploid micro-species, S. ramosissima J. Woods and S. europaea (s.s.), and populations of the midwestern diploid, S. rubra A. Nels., were also examined, affording a comparison between North American S. europaea (s.l.) and recognized species. Anther length, width of the scarious border of the fertile segment, and floral perianth shape were used to subdivide North American diploid populations into two groups. These groups were morphologically distinct from S. rubra and the European microspecies. The electrophoretic profile was unique in each morphologically distinct group of populations of S. europaea (s.l.) in northeastern North America. Based on morphological, geographical, and electrophoretic differences, diploid populations of S. europaea (s.l.) from this region are assigned to one of the following two new species: S. maritima Wolff & Jefferies, sp.nov., and S. borealis Wolff & Jefferies, sp.nov. The tetraploids are retained in S. europaea (s.l.).

Speciation and hybridisation in North American quillworts

1985 ◽  
Vol 86 ◽  
pp. 259-263 ◽  
Author(s):  
W. Carl Taylor ◽  
Neil T. Luebke ◽  
Mary B. Smith
Keyword(s):  
New Species ◽  
North America ◽  
North American ◽  
Chromosome Numbers ◽  
Distribution Patterns ◽  
Spore Formation ◽  
Enzyme Electrophoresis ◽  
Northeastern North America ◽  
Natural Hybrids ◽  
Natural Hybridisation

SynopsisSpecies of Isoetes in northeastern North America may have evolved through hybridisation and allopolyploidy. Evidence for natural hybridisation was obtained from overlapping distribution patterns, abortive and polymorphic spore formation, chromosome numbers ranging from diploid to decaploid, and additive enzyme electrophoresis profiles. The ease with which hybrids form in culture supports the hypothesis that natural hybrids occur and that hybridisation could be involved in the evolution of new species.

FABRIC OF THE LITHOSPHERE IN NORTHEASTERN NORTH AMERICA

2019 ◽  
Author(s):  
Yiran Li ◽  
◽  
Vadim Levin ◽  
Zhenxin Xie
Keyword(s):  
North America ◽  
Northeastern North America

Early Maize in Northeastern North America: A Comment on Emerson and Colleagues

2021 ◽  
Vol 86 (2) ◽  
pp. 425-427
Author(s):  
John P. Hart ◽  
William A. Lovis ◽  
M. Anne Katzenberg
Keyword(s):  
North America ◽  
Great Lakes ◽  
Empirical Evidence ◽  
River Valley ◽  
Human Bone ◽  
Northeastern North America ◽  
Isotopic Evidence ◽  
St Lawrence River

Emerson and colleagues (2020) provide new isotopic evidence on directly dated human bone from the Greater Cahokia region. They conclude that maize was not adopted in the region prior to AD 900. Placing this result within the larger context of maize histories in northeastern North America, they suggest that evidence from the lower Great Lakes and St. Lawrence River valley for earlier maize is “enigmatic” and “perplexing.” Here, we review that evidence, accumulated over the course of several decades, and question why Emerson and colleagues felt the need to offer opinions on that evidence without providing any new contradictory empirical evidence for the region.

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