scholarly journals Clarifying Affiliations of Salix gracilistyla Miq. Cultivars and Hybrids

HortScience ◽  
2016 ◽  
Vol 51 (4) ◽  
pp. 334-341 ◽  
Author(s):  
Yulia A. Kuzovkina ◽  
Michael Dodge ◽  
Irina V. Belyaeva
Keyword(s):  
North American ◽  
Early Spring ◽  
Hybrid Origin ◽  
Diagnostic Characters ◽  
The North ◽  
American Landscape ◽  
Salix Gracilistyla ◽  
Ornamental Shrub

Salix gracilistyla Miq., japanese pussy willow or rosegold willow, is an ornamental shrub commonly cultivated for its prominent display of catkins in early spring. Verification of stocks of willows in the North American landscape nursery trade revealed that another name—Salix chaenomeloides Kimura—is associated frequently with plants similar to S. gracilistyla. Morphological analyses conducted during this study have shown that the S. chaenomeloides binomial is misapplied often to S. gracilistyla, its cultivars and hybrids. A comparison of the diagnostic characters of S. gracilistyla and S. chaenomeloides is presented to explain the differences between these taxa and to promote the adoption of the correct names. Five cultivars of S. gracilistyla valued for their early spring catkin displays, variegated foliage, and pendulous habits, and two cultivars of a hybrid origin are summarized. Also, two new ornamental cultivars called Salix ‘Winter Glory’ and Salix ‘Rabbit’s Foot’ are described.

scholarly journals Genome-wide sequence-based genotyping supports a nonhybrid origin of Castanea alabamensis

2019 ◽  
Author(s):  
M. Taylor Perkins ◽  
Tetyana Zhebentyayeva ◽  
Paul H. Sisco ◽  
J. Hill Craddock
Keyword(s):  
North American ◽  
Distinct Group ◽  
Morphological Diversity ◽  
Hybrid Origin ◽  
Putative Hybrid ◽  
Eastern United States ◽  
The North ◽  
Snp Data ◽  
Genome Wide ◽  
Conservation Concern

AbstractThe genus Castanea in North America contains multiple tree and shrub taxa of conservation concern. The two species within the group, American chestnut (Castanea dentata) and chinquapin (C. pumila sensu lato), display remarkable morphological diversity across their distributions in the eastern United States and southern Ontario. Previous investigators have hypothesized that hybridization between C. dentata and C. pumila has played an important role in generating morphological variation in wild populations. A putative hybrid taxon, Castanea alabamensis, was identified in northern Alabama in the early 20th century; however, the question of its hybridity has been unresolved. We tested the hypothesized hybrid origin of C. alabamensis using genome-wide sequence-based genotyping of C. alabamensis, all currently recognized North American Castanea taxa, and two Asian Castanea species at >100,000 single-nucleotide polymorphism (SNP) loci. With these data, we generated a high-resolution phylogeny, tested for admixture among taxa, and analyzed population genetic structure of the study taxa. Bayesian clustering and principal components analysis provided no evidence of admixture between C. dentata and C. pumila in C. alabamensis genomes. Phylogenetic analysis of genome-wide SNP data indicated that C. alabamensis forms a distinct group within C. pumila sensu lato. Our results are consistent with the model of a nonhybrid origin for C. alabamensis. Our finding of C. alabamensis as a genetically and morphologically distinct group within the North American chinquapin complex provides further impetus for the study and conservation of the North American Castanea species.

scholarly journals The North American Landscape

Nature ◽  
1964 ◽  
Vol 203 (4940) ◽  
pp. 5-6
Author(s):  
C. F. DAVIDSON
Keyword(s):  
North American ◽  
The North ◽  
American Landscape

DESCRIPTION OF THE LAST INSTAR LARVA OF THE CABBAGE WEBWORM, HELLULA ROGATALIS (LEPIDOPTERA: PYRALIDAE), WITH A KEY TO LARVAE OF NORTH AMERICAN SPECIES OF HELLULA GUENÉE

1981 ◽  
Vol 113 (5) ◽  
pp. 361-364
Author(s):  
Suzanne Allyson
Keyword(s):  
North American ◽  
Instar Larva ◽  
North American Species ◽  
Diagnostic Characters ◽  
The North ◽  
Lepidoptera Pyralidae

AbstractThe last instar larva of Hellula rogatalis (Hulst) is described and illustrated. Diagnostic characters of the genus are given, and a key included for the North American species. Larvae of this genus are compared with those of Dicymolomia Zeller.

This Land Was Made for … : (Re)Appearing Black/Brown Female Corporeality, Life, and Death

Hypatia ◽  
2019 ◽  
Vol 35 (1) ◽  
pp. 190-203
Author(s):  
Esme G. Murdock
Keyword(s):  
North America ◽  
North American ◽  
Settler Colonialism ◽  
Women's Bodies ◽  
Life And Death ◽  
The North ◽  
American Landscape ◽  
Female Corporeality ◽  
Brown Bodies

Lands and bodies are often conceptualized as exhaustible objects and property within settler-colonial and neoliberal ideologies. These conceptualizations lead to underdevelopment of understandings of lands and bodies that fall outside of these ascriptions, and also attempt to actively obscure the pervasive ways in which settler colonialism violently reinscribes itself on the North American landscape through the murder and disappearance of Black and Brown women's bodies. In this article, I will argue that the continual murder and disappearance of Black and Brown women in North America facilitate the successful functioning of ongoing settler-colonial systems and projects. This violence creates and reinforces the functionality of Black/Brown bodies as the territory upon which settler identity and futurity gains traction, indeed, requires.

Sign in / Sign up

Export Citation Format

Share Document