scholarly journals Slender Moonwort, Botrychium lineare (Ophioglossaceae), Rediscovered in Quebec

2009 ◽  
Vol 123 (3) ◽  
pp. 255 ◽  
Author(s):  
Jacques Cayouette ◽  
Donald R. Farrar
Keyword(s):  
North America ◽  
Plant Species ◽  
Morphological Characters ◽  
Ongoing Study ◽  
Eastern North America ◽  
Allozyme Electrophoresis ◽  
Spore Size ◽  
Habitat Features ◽  
Gaspe Peninsula ◽  
Made In

Slender Moonwort (Botrychium lineare), described in 1994, is a very rare fern in eastern North America. It was known in Quebec, Canada, from only two sites in the Gaspé Peninsula but has not been relocated since its discovery at these sites in 1902 and 1942. An ongoing study of B. lineare and its recent discovery in northern Minnesota prompted a re-examination of a 1972 collection made in western Quebec, in Gatineau Park, previously identified under various names, including B. campestre. A recent visit (2008) to the Gatineau Park site disclosed continued presence of similar plants. Based on morphological characters, spore size, genotype (allozyme electrophoresis), and appropriate habitat features, we conclude that the newly discovered plants and those of the 1972 collection are B. lineare. B. lineare appears on the Quebec government list of plant species likely to be designated threatened or vulnerable.

scholarly journals Relationship between Invasive Plant Species and Forest Fauna in Eastern North America

Forests ◽  
2012 ◽  
Vol 3 (3) ◽  
pp. 840-852 ◽  
Author(s):  
Stephanie J. Hayes ◽  
Eric J. Holzmueller
Keyword(s):  
North America ◽  
Plant Species ◽  
Invasive Plant ◽  
Eastern North America ◽  
Invasive Plant Species

Morphometric studies of the Euphorbia esula group (Euphorbiaceae) in North America

1990 ◽  
Vol 68 (9) ◽  
pp. 1978-1988 ◽  
Author(s):  
C. W. Crompton ◽  
A. E. Stahevitch ◽  
W. A. Wojtas
Keyword(s):  
North America ◽  
Morphological Characters ◽  
Leafy Spurge ◽  
Principal Coordinate Analysis ◽  
Euphorbia Esula ◽  
Eastern North America ◽  
Single Variable ◽  
Authentic Material ◽  
Variable Species ◽  
Euphorbia Cyparissias

Leafy spurge and cypress spurge are important weeds of pastures and unimproved rangeland in western and eastern North America, respectively. Taxonomists disagree as to whether leafy spurge is a single variable species or an aggregate of two or more species. Morphometric techniques (clustering by incremental sum of squares and principal coordinate analysis) were used to analyze relationships in leafy spurge and its allies. On the basis of studying 26 morphological characters found in 200 collections representing 32 putative taxa, we concluded that in North America only four species should be recognized, namely, Euphorbia agraria Bieb., Euphorbia cyparissias L., Euphorbia esula L., and Euphorbia ×pseudoesula Schur. A key to these taxa is provided. No authentic material of Euphorbia lucida Waldst. & Kitt. and Euphorbia salicifolia Host was found from this continent in the collections we examined.

Generic relationships within Leonticeae (Berberidaceae)

1989 ◽  
Vol 67 (8) ◽  
pp. 2310-2316 ◽  
Author(s):  
Henry Loconte ◽  
James R. Estes
Keyword(s):  
North America ◽  
Morphological Characters ◽  
Eastern North America ◽  
Eastern Asia ◽  
Operational Taxonomic Units ◽  
Generic Relationships

Phenetic analyses of morphological characters of Leonticeae reveal three distinct groups of operational taxonomic units corresponding to genera. The genera Leontice and Gymnospermium of Eurasia are pheneticlly equidistant from Caulophyllum, which occurs in eastern Asia and eastern North America. On the basis of phenetic similarity, L. kiangnanensis is transferred to Gymnospermium as G. kiangnanensis.

Species of Cortinarius subgenus Leprocybe, sections Orellani and Limonei, in North America

1994 ◽  
Vol 72 (4) ◽  
pp. 520-532 ◽  
Author(s):  
R. G. Thorn ◽  
D. W. Malloch
Keyword(s):  
North America ◽  
Morphological Characters ◽  
The Other ◽  
Mushroom Poisoning ◽  
Eastern North America ◽  
Similar Species ◽  
Western North America ◽  
Genetic Studies ◽  
Rdna Sequences ◽  
Fluorescent Compounds

Descriptions and a key are provided to seven species of Cortinarius subg. Leprocybe, sect. Orellani and Limonei, that are found in North America, namely C. callisteus (synonym C. croceocolor), C. distans var. olympianus, C. gentilis (synonym C. confusus), C. limoneus (synonym C. whiteae), C. morrisii, C. rainierensis, and C. speciosissimus. Of these, C. rainierensis and C. speciosissimus were previously shown to contain the nephrotoxin orellanine. Reports of C. orellanus from North America were based on misidentifications of C. uliginosus or similar species of subg. Dermocybe. There are no apparent morphological features to distinguish C. speciosissimus, which has been found in eastern North America, from C. rainierensis, which is known only from the state of Washington in western North America, or from C. orellanoides, which was described from France. Since morphological characters were found for the distinction of sibling species discovered by biochemical and genetic studies in other genera, including Armillaria, we prefer not to accept or suggest the synonymy of these taxa until neotypes or lectotypes are selected for C. croceocolor and C. rubellus and these specimens are compared with types of the other available names using chromatography of fluorescent compounds or rDNA sequences. Key words: biosystematics, mushroom poisoning, orellanine.

CYTOTAXONOMY OF CONOPHTHORUS (COLEOPTERA: SCOLYTIDAE) IN EASTERN NORTH AMERICA

1990 ◽  
Vol 122 (6) ◽  
pp. 1131-1135 ◽  
Author(s):  
Peter de Groot ◽  
Terry J. Ennis
Keyword(s):  
North America ◽  
Geographic Variation ◽  
Distinct Species ◽  
Morphological Characters ◽  
Eastern North America ◽  
Supernumerary Chromosomes ◽  
Karyotypic Formula ◽  
Different Populations ◽  
Conophthorus Coniperda

AbstractThe male meiotic karyotypic formula of Conophthorus coniperda (Schwarz) (Coleoptera: Scolytidae) is 9AA + XY. This karyotype differs from C. resinosae Hopkins and C. banksianae McPherson, both of which have the karyotypic formula of 8AA + XY. Supernumerary chromosomes were found in different populations of C. resinosae and C. banksianae but were absent in C. coniperda. No geographic variation in the karyotypes of the three species was observed. The karyotypic formulae confirm the designations of C. coniperda and C. resinosae by morphological characters, but do not support the designation of C. banksianae as a distinct species.

The distribution of Phyllophora in the North Atlantic and Arctic regions

1971 ◽  
Vol 49 (6) ◽  
pp. 1017-1024 ◽  
Author(s):  
P. R. Newroth
Keyword(s):  
North America ◽  
North Atlantic ◽  
Eastern North America ◽  
Field Observations ◽  
The North ◽  
The United Kingdom ◽  
Arctic Regions ◽  
The North Atlantic ◽  
Mediterranean And Black Seas ◽  
Made In

The distributions of five species of Phyllophora Greville (Order Gigartinales) were examined in the North Atlantic and Arctic regions. Less detailed distributional observations of Phyllophora were made in the Mediterranean and Black Seas. Distributional records, based on extant specimens from extensive personal field observations in the United Kingdom and eastern North America and from collections in various herbaria, are recorded in tables and on maps; these records are discussed.

Naturalization of exotic plant species in north-eastern North America: trends and detection capacity

2011 ◽  
Vol 18 (2) ◽  
pp. 180-190 ◽  
Author(s):  
Claude Lavoie ◽  
Annie Saint-Louis ◽  
Geneviève Guay ◽  
Elisabeth Groeneveld ◽  
Paul Villeneuve
Keyword(s):  
North America ◽  
Plant Species ◽  
Eastern North America ◽  
Exotic Plant ◽  
Exotic Plant Species ◽  
North Eastern

scholarly journals Rebuttal of McFeeters, Ryan and Cullen, 2018, ‘Positional variation in pedal unguals of North American ornithomimids (Dinosauria, Theropoda): A Response to Brownstein (2017)’

2018 ◽  
Vol 6 ◽  
pp. 68-72
Author(s):  
Chase Doran Brownstein
Keyword(s):  
North America ◽  
Early Cretaceous ◽  
North American ◽  
Eastern North America ◽  
Substantial Evidence ◽  
Theropod Dinosaur ◽  
Positional Variation ◽  
Morphological Differences ◽  
Made In

The Arundel Clay of Maryland is among the only Early Cretaceous terrestrial units known from eastern North America. Research on some theropod dinosaur bones from this layer has indicated the presence of two ornithomimosaur taxa in the assemblage. However, a recent paper discussed issues with the definite assignment of any of these unguals to Ornithomimosauria and suggested that morphological differences originally interpreted to be indicative of the presence of two ornithomimosaurs could be explained by positional variation. Here, I show that substantial evidence persists for the presence of two ornithomimosaurs in the Arundel Clay assemblage, even considering the recent description of positional variation in ornithomimosaur pedal unguals. Furthermore, the argument against the confident assignment of these unguals to ornithomimosaurs is shown to be based on oversimplified comparisons that do not take into account the combination of features in the Arundel specimens that allow for their assignment to that clade. Although several small points made in the initial paper describing the Arundel specimens are incorrect or unsubstantiated, the differences between the Maryland unguals are outside the spectrum of positional variation and are indicative of the presence of two ornithomimosaurs in the Arundel Clay assemblage.

The moss flora of the Gaspé Peninsula (Quebec, Canada): list of species and preliminary analysis

1988 ◽  
Vol 66 (9) ◽  
pp. 1780-1799 ◽  
Author(s):  
René J. Belland ◽  
Marc Favreau
Keyword(s):  
North America ◽  
Field Studies ◽  
Eastern North America ◽  
Western North America ◽  
Last Glaciation ◽  
Extensive Field ◽  
The World ◽  
First Time ◽  
Gaspe Peninsula ◽  
Gaspé Peninsula

Extensive field studies and evaluation of previously published reports reveal a moss flora of at least 310 species for the Gaspé Peninsula. Forty species are reported for the first time from the peninsula, and Brachythecium glaciale is new to Quebec. While the Gaspé flora cannot be considered a distinctive one within the Gulf of St. Lawrence region, the large number of rare species is significant. Their presence in the Gaspé can be attributed to the diverse geology and topography of the peninsula. The bulk of the moss flora is clearly of boreal affinity, but many species have temperate, montane, or arctic – alpine distributions. Of special interest is the large proportion of species with various types of disjunct distributions, either within eastern North America or to other parts of the world, especially western North America. Some patterns strongly support the idea of survival in refugia in the Gulf of St. Lawrence region during the last glaciation.

The genus Fuscidea ( Fuscideaceae, lichenized Ascomycota) in North America

2008 ◽  
Vol 40 (04) ◽  
pp. 295-328 ◽  
Author(s):  
Alan M. FRYDAY
Keyword(s):  
New Species ◽  
North America ◽  
Distinct Species ◽  
New Combination ◽  
Eastern North America ◽  
New Combinations ◽  
Two New Species ◽  
Made In

Abstract:The species of the genus Fuscidea occurring in North America are revised. Two new species, Fuscidea appalachensis Fryday and F. texana Fryday, are described from eastern North America and southern Texas, respectively. Three new combinations are also made in Fuscidea: Lecidea aleutica Degel. is shown to be a distinct species and not a synonym of Fuscidea lowensis (H. Magn.) R. Anderson & Hertel as previously suggested and is here recognized as F. aleutica (Degel.) Fryday; non-sorediate, apotheciate specimens from eastern North America previously referred to F. recensa (Stirt.) Hertel, V. Wirth & Vězda are recognized as Fuscidea recensa var. arcuatula (Arnold) Fryday; and Fuscidea scrupulosa (Eckf.) Fryday is shown to be the correct name for Fuscidea subreagens (H. Magn.) Oberholl. & V. Wirth. Fuscidea subfilamentosa (Zahlbr.) Brako is shown to be a member of the Lecidea hypnorum group and the new combination Lecidea subfilamentosa (Zahlbr.) Fryday is made, and Lecidea gyrodes H. Magn., described from Tennessee, is shown to be a synonym of F. recensa var. arcuatula. Fuscidea cyathoides (Ach.) V. Wirth & Vězda, F. kochiana (Hepp) V. Wirth & Vězda and F. lightfootii (Sm.) Coppins & P. James are considered not to have been correctly reported from North America.

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