Key and synopsis of North American Hordeum species

1990 ◽  
Vol 68 (11) ◽  
pp. 2433-2442 ◽  
Author(s):  
Bernard R. Baum ◽  
L. Grant Bailey
Keyword(s):  
North America ◽  
Key Words ◽  
North American ◽  
Identification Key ◽  
Key To Species ◽  
Hordeum Species

A key to the species of Hordeum in North America is provided. Accompanying the key to Hordeum are accounts of species with the correct name, pertinent synonyms, common names, citations of major works, and notes on taxonomy, habitats, distribution, and variation. Photographs of inflorescences and illustrations of triads of spikelets are provided to facilitate identification. Key words: Hordeum, key to species, North America.

Limited taxonomic value of palea intercostal characteristics in North American Festuca (Poaceae)

1993 ◽  
Vol 71 (12) ◽  
pp. 1651-1659 ◽  
Author(s):  
L. L. Consaul ◽  
S. G. Aiken
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
North America ◽  
Key Words ◽  
North American ◽  
Apical Region ◽  
Key To Species ◽  
Species Groups ◽  
Epidermal Features ◽  
Scanning Electron

Morphology of the intercostal palea region of 34 Festuca species found in North America was investigated using scanning electron microscopy. Palea epidermal features are most diverse in the palea apical region and fully developed in florets approaching anthesis. The intercostal region has long cells 3–15 times longer than wide, with walls that vary from slightly to prominently thickened, and from almost straight to strongly undulate. This variation was observed among paleas collected from different locations and sometimes even on a single palea. The distribution of short cells, almost square in outline, among the long cells varied with species from solitary to paired and from abundant to sparse. Four forms of trichomes were recorded: papillae, hook trichomes, prickle hairs, and macrohairs, with one form usually predominating per species. Silicon was detected in some short cells and commonly in the tips of trichomes. A key to species groups is presented. Key words: scanning electron microscopy, palea, trichomes, silicon, epidermal features, Festuca.

The genus Cicuta in North America

1980 ◽  
Vol 58 (16) ◽  
pp. 1755-1767 ◽  
Author(s):  
Gerald A. Mulligan
Keyword(s):  
North America ◽  
North American ◽  
North American Species ◽  
Identification Key ◽  
Key To Species ◽  
The North

Four species of Cicuta (family Umbelliferae) are recognized for North America: C. maculata L. (2n = 22), C. douglasii (DC.) Coult. & Rose (2n = 44), C. virosa L. (2n = 22), and C. bulbifera L. (2n = 22). Cicuta maculata has 22 large somatic chromosomes, C. virosa has 22 small somatic chromosomes, C. bulbifera has 22 medium sized chromosomes, and C. douglasii has 22 large chromosomes and 22 small chromosomes. Four varieties of C. maculata are recognized: var. maculata, var. angustifolia Hook., var. victorinii (Fernald) Boivin, and var. bolanderi (S. Wats.) G. A. Mulligan, stat. nov. Cicuta mackenzieana Raup is considered conspecific with C. virosu. The nomenclature, distribution, and relationships of the North American species are given together with an identification key to species and varieties.

Pollen morphology and taxonomy in North American Labiatae

1992 ◽  
Vol 70 (5) ◽  
pp. 975-995 ◽  
Author(s):  
Marie Claude G. Trudel ◽  
J. K. Morton
Keyword(s):  
North America ◽  
Key Words ◽  
North American ◽  
Pollen Morphology ◽  
Taxonomic Character ◽  
The North ◽  
Primary Basis ◽  
Sem Studies

Pollen morphology is described and illustrated based on SEM studies of 118 species of Labiatae (Lamiaceae) native to North America. These include representatives of all the 36 native genera. Pollen in this family is subspheroidal and either tricolpate (subfamily Lamioideae) or hexacolpate (subfamily Nepetoideae). In most of the genera and species, the tectum is conspicuously perforated with or without a supratectal reticulum. A key to facilitate identification of the pollen of the North American Labiatae is provided. The value of pollen as a taxonomic character in this family is discussed. Pollen provides the primary basis for recognition of subfamilies in the Labiatae, but at the tribal level only the Ajugeae has distinctive pollen. Several genera, notably Collinsonia, Salvia, Teucrium, and Trichostema, have pollen that is very different from other genera in this study. At the infrageneric level pollen provides valuable taxonomic characters in several genera, notably Hyptis, Monardella, Salvia, Stachys, Teucrium, and Trichostema. Key words: Labiatae, Lamiaceae, pollen, SEM, North America.

scholarly journals Philosophy of Education in North America: Where has it been? Where is it going?

2008 ◽  
Vol 8 ◽  
Author(s):  
James Scott Johnston
Keyword(s):  
North America ◽  
Key Words ◽  
North American ◽  
Philosophy Of Education ◽  
Educational Practice ◽  
The North ◽  
Educational Theories

This paper examines the question of philosophy of education’s direction through an examination of its historical self-understandings. The North American, and particularly, U.S. context is highlighted. The thesis is that philosophy of education must reconstruct itself through attention to its past self-understandings, but most importantly, through acceptance of projects, issues, and topics that are relevant to it, and not simply to philosophy or educational practice. Some consequences of this thesis are presented at the end of the paper. Key words: philosophy of education; Dewey's influence; educational theories; historical self-understanding; pragmatism

Review of Mexican species of the genus Cryptanura Brullé with a key to species from North America (Hymenoptera: Ichneumonidae: Cryptini)

2006 ◽  
Vol 15 (1) ◽  
pp. 87-112
Author(s):  
D.R. Kasparyan ◽  
E. Ruiz Cancino
Keyword(s):  
New Species ◽  
North America ◽  
North American ◽  
North American Species ◽  
Key To Species ◽  
New Synonymy ◽  
Mexican Species

A key to 38 North American species of Cryptanura is given. 30 species are recorded for Mexico; new data on their distribution are given. 10 new species from Mexico are de¬scribed; the following new synonymy is established: Cryptanura ectypa (Cresson, 1873) = C. vallis Porter, 1977, syn. n.; C. nitidiuscula Cameron, 1886 = C. bicarinata Cushman, 1945, syn. n.

Biogeographic relationships between the macrofungi of temperate eastern Asia and eastern North America

1997 ◽  
Vol 75 (12) ◽  
pp. 2108-2116 ◽  
Author(s):  
Qiuxin Wu ◽  
Gregory M. Mueller
Keyword(s):  
North America ◽  
Key Words ◽  
North American ◽  
Field Work ◽  
Disjunct Distribution ◽  
Eastern North America ◽  
Western North America ◽  
Eastern Asia ◽  
Key Words Biogeography

Eastern North America and temperate eastern Asia reportedly share a relatively high number of taxa of macrofungi (mushrooms and relatives), including a number of taxa that have putative eastern North America – temperate eastern Asia disjunct distributions. These reports have been used to imply an affinity between the mycota (fungal equivalent of flora and fauna) of the two regions. To date, however, this affinity has not been examined in detail. A comparison of north temperate macrofungal mycotas was undertaken to examine the similarity between these regions. We used two methods in this study: (i) direct comparison of taxon lists and (ii) calculation of the Simpson Coefficient of similarity from lists of selected taxa. These analyses were based on field work, herbarium records, and published taxonomic treatments for Amanita, Lactarius, Ramaria, and Boletaceae. Results of these analyses document that taxonomic similarity between eastern North America and temperate eastern Asia mycotas can be quite high. In all cases, the calculated similarity values for eastern North America – temperate eastern Asia comparisons are higher than those between either region of North America and Europe or between western North America and eastern Asia. Furthermore, the eastern North American and temperate eastern Asian disjunct distributions of macrofungi are usually limited to the level of species or lower. Key words: biogeography, China, disjunct distribution, macrofungi, North America, Simpson Coefficient.

Review of the sulcacitus group of Euschistus (Pentatomidae: Pentatominae: Carpocorini) with description of the internal female genitalia and a new species

Zootaxa ◽  
2017 ◽  
Vol 4362 (3) ◽  
pp. 348 ◽  
Author(s):  
FILIPE MICHELS BIANCHI ◽  
KIM RIBEIRO BARÃO ◽  
JOCELIA GRAZIA
Keyword(s):  
New Species ◽  
Costa Rica ◽  
North America ◽  
External Genitalia ◽  
Identification Key ◽  
Female Genitalia ◽  
Key To Species ◽  
First Time ◽  
A New Species

Euschistus Dallas is comprised of 66 species in three subgenera. Species of the nominate subgenus occur mainly in Central and North America. Some groups of species have been proposed to Euschistus (Euschistus) based on general external and male genitalic morphologies. Here, we review the sulcacitus group providing illustrations and descriptions of the internal and external genitalia of both sexes, illustrating females for the first time. A new species, Euschistus (Euschistus) tacitus sp. nov. Bianchi & Grazia, from Mexico and Costa Rica is described. We also provide an identification key to species of the group. 

Taxonomic purgatory: Sorting out the wasp genus Myzinum Latreille in North America (Hymenoptera, Tiphiidae, Myzininae)

Zootaxa ◽  
2009 ◽  
Vol 2224 (1) ◽  
pp. 30-50 ◽  
Author(s):  
LYNN S. KIMSEY
Keyword(s):  
New Species ◽  
North America ◽  
North American ◽  
North American Species ◽  
Valid Species ◽  
Key To Species

The ten North American species of the tiphiid genus Myzinum Latreille are reviewed, redescribed and a key to species provided. The new species cocoritensis is described from southern Arizona, USA and northern Sonora, Mexico. Three genera described by Argaman 1994 (Tokoparta, Fikoplesa and Ekepirka) are synonymized under Myzinum Latreille. Myzinum spilonotum (Cameron 1908) is newly synonymized under maculatum (Fabricius 1793), Myzinum beryli (Brimley 1927) under obscurum (Fabricius 1805), and the two subspecies of Myzinum beryli, parksi Krombein 1938 and patei Krombein 1938, are synonymized under carolinianum (Panzer 1806). Myzinum fulviceps (Cameron 1900) is removed from synonymy under quinquecinctus (Fabricius 1775) and is treated as a valid species.

REVISION OF NORTH AMERICAN AGABUS LEACH (COLEOPTERA: DYTISCIDAE): INTRODUCTION, KEY TO SPECIES GROUPS, AND CLASSIFICATION OF THE AMBIGUUS-, TRISTIS-, AND ARCTICUS-GROUPS

1989 ◽  
Vol 121 (10) ◽  
pp. 861-919 ◽  
Author(s):  
D.J. Larson
Keyword(s):  
North America ◽  
North American ◽  
North American Species ◽  
Key To Species ◽  
Diagnostic Characters ◽  
Ecological Information ◽  
The North ◽  
Species Groups ◽  
Diving Beetle

AbstractThe first of a planned series of papers revising the Nearctic species of the predaceous diving beetle genus, Agabus Leach, is presented. The genus is defined in the broad sense of Sharp (1882) and Fall (1922). The North American species are divided into species groups and diagnostic characters for group recognition are summarized in a key. Assignment of species to these groups is indicated in a checklist of North American species. The ambiguus-, tristis-, and arcticus-groups are defined, their relationships discussed, and included species revised. The ambiguus-group, which is restricted to North America, contains the species A. ambiguus (Say), A. strigulosis (Crotch), A. erythropterus (Say), A. austinii Sharp, and A. klamathensis sp.nov. The tristis-group, which has a Holarctic distribution, contains two species in North America, A. tristis Aubé and A. leptapsis (LeConte). The Holarctic arcticus-group is represented by A. arcticus (Paykull) and A. anthracinus (Mannerheim) in North America. For each species, patterns of variation are described, the North American distributions mapped, and ecological information summarized.

Studies in the lichen genus Ochrolechia. 2. Corticolous species of North America

1991 ◽  
Vol 69 (4) ◽  
pp. 733-772 ◽  
Author(s):  
Irwin M. Brodo
Keyword(s):  
North America ◽  
Key Words ◽  
North American ◽  
Distribution Maps ◽  
The North ◽  
Group 5 ◽  
Crustose Lichens ◽  
First Time

Ochrolechia, a widespread genus of crustose lichens, includes 19 species growing on bark in North America. These corticolous species and several non-North American taxa are treated in this paper. Six species and one variety are described as new: O. antillarum, O. gowardii, O. montana, O. juvenalis, O. pseudopallescens, O. subisidiata, and O. trochophora var. pruinirosella. Two species are reduced to synonymy (O. californica Vers, and O. sorediosa Howard); six species are excluded from the North American flora (O. alboflavescens (Wulf.) Zahlbr., O. apiculata Vers., O. pallescens (L.) Massal., O. parella (L.) Massal., O. rhamni-purshianae Senft, O. subviridis (Höeg) Erichsen, and O. turneri (Sm.) Hasselrot). Several synonymies mentioned in the literature are confirmed (O. trochophora (Vainio) Oshio including O. rosella (Tuck.) Vers. and O. orientalis Vainio; O. androgyna (Hoffm.) Arn. including O. pergranulosa (Räs.) Vers, and O. mahluensis Räs.; and O. yasudae Vainio including O. tuckermanii Vers, and O. pennsylvanica Vers.). A key for the determination of all the species treated is presented together with distribution maps and a summary of the chemistry of the group. 5-O-Methylhiascic and 4,5-di-O-methylhiascic acids are reported from Ochrolechia for the first time. Key words: Ochrolechia, Ascomycotina, Pertusariaceae.

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