Seed Germination of North American Orchids. II. Native California and Related Species of Aplectrum, Cypripedium, and Spiranthes

1984 ◽  
Vol 145 (4) ◽  
pp. 495-501 ◽  
Author(s):  
Allison P. Oliva ◽  
Joseph Arditti
Keyword(s):  
Seed Germination ◽  
North American ◽  
Related Species

The Natural Groups of Species in the Genus Ips De Geer (Coleoptera: Scolytidae) in North America

1963 ◽  
Vol 95 (5) ◽  
pp. 508-516 ◽  
Author(s):  
G. R. Hopping
Keyword(s):  
North America ◽  
North American ◽  
Related Species ◽  
North American Species ◽  
Closely Related Species ◽  
The North ◽  
The World ◽  
Group Relationships ◽  
Natural Groups

AbstractThe genus Ips is one of four closely related genera in the tribe Ipini, sub-tribe Ipina (De Geer 1775, Balachowsky 1949, Nunberg 1954, Hopping 1963). There are now 32 species of Ips recognized in North America, with a few more as yet undescribed. This paper defines the groups of closely related species with observations on the group relationships of species from other parts of the world. Work is in progress to define the North American species in each group.

A TAXONOMIC REVISION OF THE GENUS PSEUDOPHYSALOPTERA BAYLIS, 1934 (NEMATODA: PHYSALOPTERIDAE)

1963 ◽  
Vol 41 (6) ◽  
pp. 1069-1077 ◽  
Author(s):  
G. A. Schad
Keyword(s):  
North American ◽  
Related Species ◽  
Taxonomic Revision ◽  
Distinct Species ◽  
Closely Related Species ◽  
Tentative Identification

The genus Pseudophysaloptera, recognized as a genus distinct from Physatoptera, is tentatively considered monotypic. The several species previously assigned to the genus Pseudophysaloptera, and the closely related species Physaloptera kotlani, have been reduced to one polytypic species, Pseudophysaloptera formosana, with two subspecies, P. f. formosana and P. f. soricina. The former occurs in Oriental species of Suncus, while the latter occurs in Palaearctic and Ethiopian soricid insectivores. North American specimens, which may represent a distinct species, are tentatively assigned to P. f. soricina. Presently available collections are only sufficient for a tentative identification of the Nearctic form.

scholarly journals Seed germination and dormancy traits of forbs and shrubs important for restoration of North American dryland ecosystems

Plant Biology ◽  
2018 ◽  
Vol 21 (3) ◽  
pp. 458-469 ◽  
Author(s):  
O. A. Kildisheva ◽  
T. E. Erickson ◽  
M. D. Madsen ◽  
K. W. Dixon ◽  
D. J. Merritt
Keyword(s):  
Seed Germination ◽  
North American ◽  
Dryland Ecosystems

North American Components of the Genus Diasemia of Authors (Lepidoptera: Pyralidae)

1957 ◽  
Vol 89 (4) ◽  
pp. 164-170 ◽  
Author(s):  
Eugene Munroe
Keyword(s):  
Structural Study ◽  
North American ◽  
Related Species ◽  
Type Species ◽  
New Combination ◽  
New Genera ◽  
Undescribed Species ◽  
The North ◽  
Lepidoptera Pyralidae ◽  
The Tropics

Work undertaken in connection with Mr. C. P. Kimball's projected list of Florida Lepidopera has revealed a number of problems in the North American species usually referred to Diasemia Hübner ([1824-25] p. 348), type Pyralis literalis Denis and Schiffermüller (=Phalaena litterata Scopoli) (Figs. 1, 2). A structural study shows that these species belong to five groups, generically distinct from one another and from the type species of Diasemia. Diasemia alaskalis Gibson (Fig. 3) is congeneric with Udea ferrugalis (Hübner) and should be known as Udea alaskalis (Gibson), new combination. I have characterized the genus Udea Guenée in an earlier paper (Munroe, 1950). Diasemia plumbosignalis Fernald (Fig. 10) and related species belong to the genus Choristostigma Warren, 1892: 440. The species of Choristostigma will be discussed in a separate publication. Diasemia magdalena Fernald and an undescribed species belong to the genus Daulia Walker (1859: 975) hitherto known from the tropics of the Old World and from Argentina. Hydrocampa ramburialis Duponchel and Desmia? janassialis Walker require new genera.

KARYOLOGY OF NORTH AMERICAN NATRICINE SNAKES (FAMILY COLUBRIDAE) OF THE GENERA NATRIX AND REGINA

1973 ◽  
Vol 15 (2) ◽  
pp. 355-361 ◽  
Author(s):  
C. William Kilpatrick ◽  
Earl G. Zimmerman
Keyword(s):  
Sex Chromosomes ◽  
North American ◽  
Related Species ◽  
Related Genus ◽  
Chromosomal Variation ◽  
Closely Related Species ◽  
Old World ◽  
Water Snake ◽  
The Family

Four species of the water snake genus Natrix have a distinctly different pattern of chromosomal morphology than found in two species of the related genus Regina. Natrix all have a karyotype with seven pairs of large or medium-sized submetacentric autosomes, three pairs of medium-sized subtelocentric autosomes, and seven pairs of small metacentric autosomes. All have a 2n of 36 with a submetacentric Z and submetacentric or subtelocentric W. The autosomal complement of Regina consists of seven pairs of large to medium-sized submetacentrics, five pairs of medium-sized submetacentrics, and five pairs of small metacentrics. The Z and W are both submetacentric chromosomes. The sex chromosomes are easily distinguished in both genera. The relationships of Natrix and Regina and Old World Natrix are discussed, as well as chromosomal variation in closely related species in the family Colubridae.

scholarly journals Another new exotic bark beetle in Florida: Ernoporus parvulus (Eggers, 1943) (Coleoptera: Curculionidae: Scolytinae), with additional taxonomic changes

Zootaxa ◽  
2021 ◽  
Vol 4991 (1) ◽  
pp. 185-191
Author(s):  
ANDREW J. JOHNSON
Keyword(s):  
Bark Beetle ◽  
North American ◽  
Related Species ◽  
Pinellas County ◽  
Taxonomic Changes ◽  
The Caribbean ◽  
Genus Two

The bark beetle, Ernoporus parvulus (Eggers, 1943) was collected from Pinellas County, Florida, USA representing the first North American record of the genus. Two species previously described from the Caribbean were examined and are synonymous: Ernoporus minutus (Bright & Torres, 2006) syn. nov. and E. exquisitus (Bright, 2019) syn. nov. This beetle is likely an overlooked exotic from Africa, known only from sea hibiscus, Talipariti tiliaceum (L.) Fryxell (Malvaceae). There is no evidence that this is a threat to commercial or ornamental Hibiscus and related species.  

scholarly journals Evolutionary relationships between drought-related traits and climate shape large hydraulic safety margins in western North American oaks

2021 ◽  
Vol 118 (10) ◽  
pp. e2008987118
Author(s):  
Robert P. Skelton ◽  
Leander D. L. Anderegg ◽  
Jessica Diaz ◽  
Matthew M. Kling ◽  
Prahlad Papper ◽  
...  
Keyword(s):  
North American ◽  
Related Species ◽  
Vascular System ◽  
Xylem Embolism ◽  
Closely Related Species ◽  
Geographic Ranges ◽  
Resistant Species ◽  
Optical Visualization ◽  
Safety Margins ◽  
Dated Phylogeny

Quantitative knowledge of xylem physical tolerance limits to dehydration is essential to understanding plant drought tolerance but is lacking in many long-vessel angiosperms. We examine the hypothesis that a fundamental association between sustained xylem water transport and downstream tissue function should select for xylem that avoids embolism in long-vessel trees by quantifying xylem capacity to withstand air entry of western North American oaks (Quercus spp.). Optical visualization showed that 50% of embolism occurs at water potentials below −2.7 MPa in all 19 species, and −6.6 MPa in the most resistant species. By mapping the evolution of xylem vulnerability to embolism onto a fossil-dated phylogeny of the western North American oaks, we found large differences between clades (sections) while closely related species within each clade vary little in their capacity to withstand air entry. Phylogenetic conservatism in xylem physical tolerance, together with a significant correlation between species distributions along rainfall gradients and their dehydration tolerance, suggests that closely related species occupy similar climatic niches and that species' geographic ranges may have shifted along aridity gradients in accordance with their physical tolerance. Such trends, coupled with evolutionary associations between capacity to withstand xylem embolism and other hydraulic-related traits, yield wide margins of safety against embolism in oaks from diverse habitats. Evolved responses of the vascular system to aridity support the embolism avoidance hypothesis and reveal the importance of quantifying plant capacity to withstand xylem embolism for understanding function and biogeography of some of the Northern Hemisphere’s most ecologically and economically important plants.

scholarly journals A Germination Protocol for Small Seed Lots

1994 ◽  
Vol 12 (4) ◽  
pp. 223-226
Author(s):  
Richard H. Munson ◽  
Robert G. Nicholson
Keyword(s):  
Seed Germination ◽  
Plant Species ◽  
Related Species ◽  
Ecological Factors ◽  
Climatic Conditions ◽  
Propagation Process ◽  
Public Gardens ◽  
Small Seed ◽  
Propagation Methods ◽  
Propagation Material

Abstract The nursery industry depends on public gardens to supply propagation material for newly introduced plant species grown from seed. Most seed obtained by public gardens is received in small quantities and must be handled efficiently to assure at least minimal germination. A seed germination protocol is proposed which leads the propagator through a series of steps including a systematic search of the literature, a comparison of species about which little or nothing is known to related species with known propagation methods, a study of the climatic conditions present in the seeds' native area, a study of ecological factors that may affect germination, and finally to the propagation process itself. Examples are provided which illustrate how the protocol is used.

The first record of Suillus acidus var. intermedius (Suillaceae, Boletales) for Europe from the Northern Urals

2015 ◽  
Vol 49 ◽  
pp. 204-212
Author(s):  
M. A. Palamarchuk
Keyword(s):  
North American ◽  
Related Species ◽  
Nature Reserve ◽  
First Record ◽  
Morphological Description ◽  
Closely Related Species ◽  
Line Drawings ◽  
Northern Urals ◽  
Tomsk Region

Information on the records of Suillus acidus var. intermedius in the Northern Urals (Pechora-Ilych Nature Reserve) is given. This species, characterized by predominantly North American distribution, was previously noted in Russia only from the Tomsk Region. The finding of the species in Pechora-Ilych Nature Reserve is its first record in Europe. S. acidus var. intermedius is characterized by fruit bodies of the boletoid type, convex, slimy, yellow-brown cap, and stem with ring covered with black glandular dots. From closely related species it differs by acid taste of the cap cuticle (S. subalutaceus), yellowish or yellow-brown cap (S. acidus, S. salmonicolor), the presence of a distinct ring on stem and lacking scales on the cap (S. sibiricus). The article provides a detailed morphological description of the species, accompanied by line drawings and color photos.

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