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Life History Variation In Two Populations Of California Newt, Taricha Torosa, Michael P. Marchetti, Abigail Hayes Jun 2020

Life History Variation In Two Populations Of California Newt, Taricha Torosa, Michael P. Marchetti, Abigail Hayes

Western North American Naturalist

California Newts (Taricha torosa) are common amphibians throughout much of California, yet their life history has been little studied. We examined T. torosa in 2 physically separated breeding locations, a farm pond and a nearby stream, between February and June 2015. We synoptically collected physical measurements on adults as well as tissue samples from a subset of the newts present in both locations throughout the time period. Stable isotopes of carbon and nitrogen were used to characterize the trophic niche space among newts of different locations and ages. Our results suggest differentiated breeding phenologies as well as unique …

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Occurrence Of North American Porcupine (Erethizon Dorsatum) In The Black Hills, South Dakota, Lenora M. Dombro, Earl Perez-Foust, Daniel Roddy, Daryl E. Mergen, Robert A. Gitzen Jun 2020

Occurrence Of North American Porcupine (Erethizon Dorsatum) In The Black Hills, South Dakota, Lenora M. Dombro, Earl Perez-Foust, Daniel Roddy, Daryl E. Mergen, Robert A. Gitzen

Western North American Naturalist

During the twentieth century, the North American porcupine (Erethizon dorsatum) was common in the Black Hills of western South Dakota and northeastern Wyoming. However, the low number of recent observations in the region has led to concern that porcupine populations have declined. We conducted systematic surveys to assess porcupine occurrence at two hundred and sixty-three 1-ha sites in the Black Hills National Forest, Custer State Park, Jewel Cave National Monument, Mount Rushmore National Memorial, and Wind Cave National Park during 2016–2017. We observed no porcupines or recent feeding sign. We also noted few recent observations in information compiled …

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Predictors Of Psychosocial And Physiological Distress In Colorectal Cancer Patients, Hyrum Eddington Jun 2020

Predictors Of Psychosocial And Physiological Distress In Colorectal Cancer Patients, Hyrum Eddington

Undergraduate Honors Theses

Distress among cancer patients has been broadly accepted as an important indicator of patient well-being. However, questions remain such as what patient characteristics are associated with high distress and whether patient-reported distress is correlated with distress biomarkers. To answer these questions, we performed a survey study of 238 colorectal patients in which we assessed patient-reported distress, possible contributors to that distress, and patient anxiety and depression. We also abstracted demographic and clinical information from patient charts and collected measures for salivary cortisol and sarcopenia. We conducted bivariate statistical analyses between patient demographics, clinical factors, and psychosocial measures with our three …

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Information Geometry And Model Reduction In Oscillatory And Networked Systems, Benjamin Lane Francis Jun 2020

Information Geometry And Model Reduction In Oscillatory And Networked Systems, Benjamin Lane Francis

Theses and Dissertations

In this dissertation, I consider the problem of model reduction in both oscillatory and networked systems. Previously, the Manifold Boundary Approximation Method (MBAM) has been demonstrated as a data-driven tool for reducing the parametric complexity of so-called sloppy models. To be effective, MBAM requires the model manifold to have low curvature. I show that oscillatory models are characterized by model manifolds with high curvature in one or more directions. I propose methods for transforming the model manifolds of these models into ones with low curvature and demonstrate on a couple of test systems. I demonstrate MBAM as a tool for …

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Ems Mutagenesis In Quinoa: Developing A Genetic Resource, Brian James Cox Jun 2020

Ems Mutagenesis In Quinoa: Developing A Genetic Resource, Brian James Cox

Theses and Dissertations

Chenopodium quinoa, a South American pseudocereal, has valuable agricultural traits such as salt tolerance and drought tolerance, and it has beneficial nutritional properties such as high protein content and a complete amino acid profile. However, problems including disease susceptibility, low harvest index, lodging, seed shattering, low heat tolerance, and saponin content plague quinoa. Genetic resources for quinoa are needed to fix these problems and make quinoa more available throughout the world. We used ethyl methanesulfonate (EMS) to create a mutant population of QQ74 quinoa (USDA GRIN PI 614886) of 5,030 mutant families. We did whole exome sequencing (WES) on 44 …

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An Inventory Of Springsnails (Pyrgulopsis Spp.) In And Adjacent To The Spring Mountains, Nevada, Kevin S. Mckelvey, Corey Kallstrom, Jeri Ledbetter, Donald W. Sada, Kristine L. Pilgrim, Michael K. Schwartz Jun 2020

An Inventory Of Springsnails (Pyrgulopsis Spp.) In And Adjacent To The Spring Mountains, Nevada, Kevin S. Mckelvey, Corey Kallstrom, Jeri Ledbetter, Donald W. Sada, Kristine L. Pilgrim, Michael K. Schwartz

Western North American Naturalist

Springsnails (genus Pyrgulopsis, hereafter pyrgs) are small freshwater aquatic gastropods that occur in isolated springs in western North America. Pyrgs are species of conservation concern, but patterns of occupancy and speciation are complex. We investigated patterns of occurrence for pyrgs in the Spring Mountains, Clark County, Nevada. We were primarily concerned with identifying springs containing the species P. deaconi, the Spring Mountains pyrg, and P. turbatrix, the southeast Nevada pyrg. We identified species through genetic analysis of the COI-1 mitochondrial region and examined patterns of genetic structure. We located aquatic gastropods in 26 springs and analyzed 420 …

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Creating Library Learning Spaces That Support Twenty-First Century Pedagogy And Student Learning, Deborah Lynn Christoffersen Jun 2020

Creating Library Learning Spaces That Support Twenty-First Century Pedagogy And Student Learning, Deborah Lynn Christoffersen

Theses and Dissertations

University libraries struggle to keep up with rapidly changing technology and the associated change in teaching strategy. Most administrators and librarians are often not trained to assess space needs and struggle to reassign library spaces for non-traditional library use. As such, they often embark on expensive and time-consuming feasibility studies, using (typically) hard-earned monies to complete the research or to pilot a new space. What academic research library administrators and staff lack is an analysis tool for discovering and planning needed renovations and improvements in aging library facilities. The purpose of this research project was to determine how students use …

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Declines Of Black-Billed Magpie (Pica Hudsonia) And Black-Capped Chickadee (Poecile Atricapillus) In The North-Central United States Following The Invasion Of West Nile Virus, Stephen J. Brenner, Joel G. Jorgensen Jun 2020

Declines Of Black-Billed Magpie (Pica Hudsonia) And Black-Capped Chickadee (Poecile Atricapillus) In The North-Central United States Following The Invasion Of West Nile Virus, Stephen J. Brenner, Joel G. Jorgensen

Western North American Naturalist

West Nile virus (WNV) is an introduced pathogen, transmitted by mosquitos, that spread across North America following its arrival there in 1999. Birds host the virus, but consequences of the disease to bird species have been variable. A small number of avian species are especially susceptible to WNV, experience high mortality rates when infected, and have shown regional declines apparently because of the disease. Other species have seemingly been unaffected. Transmission of WNV is associated with climate, with higher incidence of transmission in dry areas with warm winters. The north-central United States is an area that exhibits clines in temperature …

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Pedagogical Approaches And Instructional Content That Predict Increased Acceptance Of Biological Evolution In University Students, Clinton Thomas Laidlaw Jun 2020

Pedagogical Approaches And Instructional Content That Predict Increased Acceptance Of Biological Evolution In University Students, Clinton Thomas Laidlaw

Theses and Dissertations

Evolution is the central organizing theory of biology. Without evolutionary theory, biology becomes a somewhat tangential assemblage of facts about living organisms, which is precisely how it is viewed by many students. Many teachers teach evolution in a limited capacity or avoid it entirely due to fear of opposition, lack of confidence in their own understanding, or lack of acceptance of the theory themselves. When evolution is not taught, or is not accepted, it cannot be utilized to make sense of the field, and is quickly forgotten by students. While some studies have shown a correlation between instruction about evolution …

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Entropy's Child, Brandon Reed Boulton Jun 2020

Entropy's Child, Brandon Reed Boulton

Theses and Dissertations

Art, process, and materials offer me an escape from the sometimes-crushing realities of my personal struggle with chronic mental illness. Escape is often my primary motivator for making art. However, personal meaning and understanding sometimes come while I'm working in the studio. Sometimes the meanings of the work only become clear years later. Personal experience and experimenting with materials and processes have led me to an appreciation and awareness of entropy--the second law of thermodynamics. My sculptures use spontaneity, abstraction, and process to dialogue with entropy.

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A Corpus-Based Study Of The Gender Assignment Of Nominal Anglicisms In Brazilian Portuguese, Taryn Marie Skahill Jun 2020

A Corpus-Based Study Of The Gender Assignment Of Nominal Anglicisms In Brazilian Portuguese, Taryn Marie Skahill

Theses and Dissertations

The purpose of this study is to analyze the variability of gender assignment to nominal anglicisms in Brazilian Portuguese and to identify how the orthography of English loanwords and their establishment in the language influences such variation. This study also seeks to identify the most important factors that govern such gender assignment. The data were gathered from two Portuguese corpora, one consisting of more formal and edited language (Corpus do Português, News on the Web) and the other consisting of less formal and unaltered language, such as blog posts (Corpus do Português, Web/Dialects). Forty anglicisms were analyzed in order to …

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Longitudinal Predictors Of Helicopter Parenting In Emerging Adulthood, Laura M. Padilla-Walker, Larry J. Nelson, Ryan D. Mclean Jun 2020

Longitudinal Predictors Of Helicopter Parenting In Emerging Adulthood, Laura M. Padilla-Walker, Larry J. Nelson, Ryan D. Mclean

Faculty Publications

The purpose of this exploratory longitudinal study was to examine stability and change of helicopter parenting throughout the first few years of emerging adulthood and to examine child and parent–child relational factors that might predict helicopter parenting. Participants included 453 emerging adults from a northwestern city in the United States (51% female, 33% single-parent families) who participated in a 10-year longitudinal study, with the current study examining ages 19–21. Results revealed that (a) for both mothers and fathers, helicopter parenting decreased over time, (b) some child and relational factors predicted initial levels of helicopter parenting, but (c) the findings were …

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Low-Cost Diagnostics: Using Paper As A Material And Pens As An Instrument, Annie Armitstead Jun 2020

Low-Cost Diagnostics: Using Paper As A Material And Pens As An Instrument, Annie Armitstead

Undergraduate Honors Theses

Lateral flow immunoassays (LFIs) are equipment-free tests that produce results quickly using small sample volumes. Colored lines appear as the test runs, indicating the presence of a biomarker. LFIs are ideal in a variety of settings. Development of these assays can be complicated for small team operations, and tests are not sufficiently adaptable for low resource settings. If robust point-of-care tests can be developed on site, they can expand the reach of global diagnostics, improving health around the world. We report a simple empowering LFI (seLFI) that only requires treated printer paper and a plastic backing card. This eliminates the …

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The Effect Of Ethnic Identity On Motivation To Bephysically Active In Schools In Hawai’I, Nathan A. K. Kahaiali'i Jun 2020

The Effect Of Ethnic Identity On Motivation To Bephysically Active In Schools In Hawai’I, Nathan A. K. Kahaiali'i

Theses and Dissertations

This cross-sectional study examines if there is a relationship between student ethnic identity and their motivation towards physical activity (PA), with a particular interest with students who self-identify as Hawaiian. Results indicate that there is a small but positive correlation between motivational indices and measures of ethnic identity. This study surveyed 301 sixth, seventh, and eighth grade students from one of the Hawaiian Islands. The survey consisted of the Situational Intrinsic Motivation Scale (SIMS) instrument (Guay, Vallerand, & Blanchard, 2000) to measure motivation of PA and the Multigroup Ethnic Identity Measure-Revised (MEIM-R) instrument (Phinney & Ong, 2007) to measure ethnic …

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Using Group Affinity To Predict Community Formation In Social Networks, Joseph Leung Jun 2020

Using Group Affinity To Predict Community Formation In Social Networks, Joseph Leung

Undergraduate Honors Theses

A well-studied topic in network theory is detecting the communities found in real-world networks. Community detection is a technique to better understand the way in which small dense substructures appear in these networks. Such substructures can often tell important information about groups that form in such systems. A prominent feature of many networks is that they evolve over time, forming and dissolving new edges between different nodes that appear. In this thesis, we consider how we can use the community structure of a network at a certain point in time to predict the state of a network’s communities at some …

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Reproductive Failure Predicts Intracolony Dispersal Of Female Black-Tailed Prairie Dogs (Cynomys Ludovicianus) In A Northern Population, Jillian M. Kusch, Colleen C. Matzke, Jeffrey E. Lane Jun 2020

Reproductive Failure Predicts Intracolony Dispersal Of Female Black-Tailed Prairie Dogs (Cynomys Ludovicianus) In A Northern Population, Jillian M. Kusch, Colleen C. Matzke, Jeffrey E. Lane

Western North American Naturalist

Dispersal in mammals is typically male-biased and occurs primarily in sexually immature individuals. These dispersal characteristics are especially true for ground-dwelling sciurids, such as black-tailed prairie dogs (Cynomys ludovicianus), that have polygynous breeding systems, with dispersing males and philopatric females. Prairie dogs are small, colonial rodents found in patches throughout the Great Plains of North America. Previous literature reports that females exist in philopatric units called coteries, typically with one unrelated breeding male. Yearling males disperse from their natal coterie in order to form their own coteries. We observed 1450 prairie dogs over 3 consecutive years in one …

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Post-Birth Marriage, White-Hispanic Families, And Child Academic Achievement, Sadie Andrews Slighting Jun 2020

Post-Birth Marriage, White-Hispanic Families, And Child Academic Achievement, Sadie Andrews Slighting

Theses and Dissertations

Over the past decade, policymakers have promoted marriage as a pathway to improve child outcomes in single-parent households. However, previous research on single mothers who later married in the United States has failed to examine how the structural advantages and disadvantages of race influence post-birth marriages and the advantage they may confer. I investigate how white advantage—the human- and social-capital benefits that come from being a white individual—acts as a resource distributed differently across three couple configurations. I predict that having access to white advantage via a white parent will improve child academic achievement. Using the US Early Childhood Longitudinal …

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Baby On The Way, Sex Gone Away? A Dyadic Investigation Of Sexual Satisfaction In Pregnancy, David Brent Allsop Jun 2020

Baby On The Way, Sex Gone Away? A Dyadic Investigation Of Sexual Satisfaction In Pregnancy, David Brent Allsop

Theses and Dissertations

Research indicates that having high sexual satisfaction during pregnancy is difficult for couples. This negative trend is important considering that low sexual satisfaction can negatively affect both relationship satisfaction, psychological health, and child outcomes. However, there is evidence that this trend does not apply to all and different groups of couples exist in terms of their sexual satisfaction in pregnancy. Guided by family systems theory and the biopsychosocial model, the current study explored if different subsets of couples, composed of pregnant wives and husbands, exist in terms of their sexual satisfaction during pregnancy and what factors distinguish potential subsets. Using …

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Developmental Predictors Of Adolescent Alcohol Intake: A Nonhuman Primate Model, Elizabeth Katherine Wood Jun 2020

Developmental Predictors Of Adolescent Alcohol Intake: A Nonhuman Primate Model, Elizabeth Katherine Wood

Theses and Dissertations

Alcohol abuse is one of the costliest human health problems in the United States. Studies assessing the etiology of alcohol use disorders (AUDs) in adulthood suggest that these disorders are predicted by trait-like differences, such as low or impaired central serotonin or temperamental anxiety. Few studies, however, have assessed neonatal, infant, and adolescent characteristics that lead to alcohol abuse in adolescence. Given that the expression of AUDs is rooted in biological processes, the set of studies presented in this work investigate the early origins of excessive alcohol use in adolescence, with an overall goal of identifying risk factors that may …

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Microfabricated Fluidic Devices For Biological Assays And Bioelectronics, Anna V. Bickham Jun 2020

Microfabricated Fluidic Devices For Biological Assays And Bioelectronics, Anna V. Bickham

Theses and Dissertations

Microfluidics miniaturizes many benchtop processes and provides advantages of low cost, reduced reagent usage, process integration, and faster analyses. Microfluidic devices have been fabricated from a wide variety of materials and methods for many applications. This dissertation describes four such examples, each employing different features and fabrication methods or materials in order to achieve their respective goals. In the first example of microfluidic applications in this dissertation, thermoplastics are hot embossed to form t-shaped channels for microchip electrophoresis. These devices are used to separate six preterm birth (PTB) biomarkers and establish a limit of detection for each. The next chapter …

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Distribution And Population Structure Of Ambystoma Altamirani From The Llano De Lobos, State Of México, Mexico, Zeltzin A. Villanueva Camacho, Geoffrey R. Smith, Raymundo Montoya Ayala, Julio A. Lemos-Espinal Jun 2020

Distribution And Population Structure Of Ambystoma Altamirani From The Llano De Lobos, State Of México, Mexico, Zeltzin A. Villanueva Camacho, Geoffrey R. Smith, Raymundo Montoya Ayala, Julio A. Lemos-Espinal

Western North American Naturalist

Ambystoma altamirani is an endangered salamander found in high mountain streams in the vicinity of México City, and its populations might be threatened by urban growth. Here we report our research on a previously unstudied population of A. altamirani at the Llano de Lobos in the Sierra de las Cruces. The study ran from September 2018 to September 2019. The number of observed individuals was relatively constant across months. The only months when we observed gilled adults were February and July, and the only months when we saw juveniles without gills were January, February, and August, suggesting that the transformation …

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Cronobacter Sakazakii Genes Contributing To Persistencein Low-Moisture Dairy Matrices, Kaitlin Ash Hartmann Jun 2020

Cronobacter Sakazakii Genes Contributing To Persistencein Low-Moisture Dairy Matrices, Kaitlin Ash Hartmann

Theses and Dissertations

Cronobacter sakazakii is a gram-negative opportunistic pathogen known to survive in dry environments and food matrices, such as infant formula. This foodborne bacterium can cause fatal human infections of the blood, central nervous system, and gastrointestinal tract; it is also problematic in wounds and urinary tract infections. Preterm infants and immunocompromised individuals are in higher risk categories related to necrotizing enterocolitis, neonatal sepsis, and meningitis due to this organism. Therefore, there is a need for increased understanding of how this bacterium is able to persist in thermally treated low-moisture products that do not support growth. The objective of this research …

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First Recorded Observations Of Conspecific Egg And Nestling Consumption In Common Ravens (Corvus Corax), Joseph L. Atkinson, Peter S. Coates, Brianne E. Brussee, David J. Delehanty Jun 2020

First Recorded Observations Of Conspecific Egg And Nestling Consumption In Common Ravens (Corvus Corax), Joseph L. Atkinson, Peter S. Coates, Brianne E. Brussee, David J. Delehanty

Western North American Naturalist

We observed cannibalism, the act of consuming a conspecific, of eggs and nestlings by Common Ravens (Corvus corax; hereafter “raven”) by video-monitoring nests in Nevada and California. Specifically, within the sagebrush steppe of Nevada, adult ravens killed and consumed raven chicks from an active nest. Additionally, on the coast of California, we observed adult ravens consume inviable eggs from their own nest following full-term incubation. To our knowledge, these observations represent the first documented cannibalistic behavior by ravens.


Usando cámaras de monitoreo que instalamos en nidos de Nevada y California, observamos canibalismo, el acto de consumir huevos y …

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Stress And Performance Anxiety Intervention For Musicians:A Biofeedback And Compassion Focused Therapy Intervention, Tara Austin Jun 2020

Stress And Performance Anxiety Intervention For Musicians:A Biofeedback And Compassion Focused Therapy Intervention, Tara Austin

Theses and Dissertations

Performance anxiety and stress are forefront problems for performers in the music industry. Within music training programs, these problems are particularly debilitating. These students are concerned both about performance situations and also their personal lives. The following study compared two treatments, heart rate variability (HRV) biofeedback and Compassion Focused Therapy (CFT) on the effects of cortisol and self-reported stress and mood before and after a required end of semester performance. Thirty students enrolled in a college music program participated in the five-visit intervention (14 in the HRV biofeedback group and 16 in the CFT group). Stress levels, measured by self-report, …

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Reliability And Validity Practices In Randomized Controlled Trials: Current Trends And Recommendations, Jennifer A. Z. Romano Jun 2020

Reliability And Validity Practices In Randomized Controlled Trials: Current Trends And Recommendations, Jennifer A. Z. Romano

Theses and Dissertations

The verity of conclusions drawn from psychological research hinges on the reliability and validity of the measures used to collect the data. Any research conducted using measures with low reliability or validity is rendered essentially useless; thus, reporting reliability and validity evidence for measures employed in research is an essential component in creating rigorous, replicable research. Multiple reporting standards have been implemented and revised over the years with the intent to improve measurement and reporting practices within clinical psychology, though few guidelines have been suggested regarding adequate reporting practices for studies' measures. We reviewed a representative sample of randomized clinical …

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Do Shape And Volume Of Subcortical Neural Structures Involved In Reward Processing Correlate With Body Mass And Food Reward In Adolescent Females?, Kelsey K. Zaugg Jun 2020

Do Shape And Volume Of Subcortical Neural Structures Involved In Reward Processing Correlate With Body Mass And Food Reward In Adolescent Females?, Kelsey K. Zaugg

Theses and Dissertations

Background: The prevalence of adolescent obesity has increased drastically in the last few decades, spurring research examining causes and consequences of this chronic health condition. Neuroimaging techniques are being used to determine possible neural correlates of obesity that could help inform research in this field. However, the research among adolescents is not as abundant and findings so far are contradictory. This study sought to examine the association of the shape and volume of subcortical brain structures involved in reward processing with weight status in adolescent females. Additionally, this study sought to determine if the shape and volume of these structures …

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Current Distribution Of The California Vole (Microtus Californicus) In Baja California, Mexico, Alan Harper, Anny Peralta-García, Jorge H. Valdez-Villavicencio, Scott Tremor, Chris J. Conroy Jun 2020

Current Distribution Of The California Vole (Microtus Californicus) In Baja California, Mexico, Alan Harper, Anny Peralta-García, Jorge H. Valdez-Villavicencio, Scott Tremor, Chris J. Conroy

Western North American Naturalist

We revisited 26 of the 28 known collection sites for the California vole, Microtus californicus, in Baja California, Mexico. With live trapping, we were able to confirm the continued presence of the vole at 7 of these sites, which include all 3 of the subspecies endemic to Baja California. At 14 of these sites, no viable habitat was found. These 14 sites included all known occurrences of M. californicus sanctidiegi in Baja California. Based on capture numbers or lack of habitat, population size may be drastically reduced at all sites except one. Effective conservation actions are required for recovery …

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Father-Adolescent Relationship Closeness: A Path Analysis Of Family Factor Associates With Father-Adolescent Engagement And Relationship Quality, Mark H. Trahan, Richard H. Morely, Kevin Shafer Jun 2020

Father-Adolescent Relationship Closeness: A Path Analysis Of Family Factor Associates With Father-Adolescent Engagement And Relationship Quality, Mark H. Trahan, Richard H. Morely, Kevin Shafer

Faculty Publications

Father-adolescent child relationship quality has been identified as key to adolescent health outcomes. While factors have previously been identified associated with father-adolescent closeness, a comprehensive model of understanding the influence of these factors is needed. Using cross-sectional data from the Study of Contemporary Fatherhood (SCF), this analysis of father-adolescent relationship closeness evaluated responses of nine hundred (N = 900) father surveys to investigate historical factors, including own father relationship quality, biological fathering, family transitions, and ACEs along with current factors, including co-parenting, depression, parenting stress, knowledge of adolescent, warmth, and engagement, on father-adolescent relationship closeness. Path analysis results indicate that …

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Gender Vs. Sex: Defining Meaning In A Modern World Through Use Of Corpora And Semantic Surveys, Mary Elizabeth Garceau Jun 2020

Gender Vs. Sex: Defining Meaning In A Modern World Through Use Of Corpora And Semantic Surveys, Mary Elizabeth Garceau

Theses and Dissertations

Considerable resources in U.S. legal studies are devoted to determining the precise meaning of contested terms specifically in statutory interpretation. Traditional judicial approaches have defined meaning using dictionaries. This reliance has led to Mouritsen’s (2010) observation that "the judicial conception of lexical meaning—i.e., what judges think about what words mean … is often [subjectively] outcome determinative." Beginning with Mouritsen’s (2010) article, a movement in U.S. legal scholarship offers corpus linguistics as a more objective method to resolving contested meaning (Lee and Mouritsen, 2018). However, I assert that weaknesses still exist in contemporary applications of corpus linguistics to legal interpretation. I …

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Flower Color Variation In Jones’ Penstemon, Penstemon × Jonesii Pennell (P. Eatonii A. Gray × P. Laevis Pennell) (Plantaginaceae), W. Wesley Crump, Jason M. Stettler, Robert L. Johnson, Chris D. Anderson, Sarah Harrison, Lindsey M. Meservey, Mikel R. Stevens Jun 2020

Flower Color Variation In Jones’ Penstemon, Penstemon × Jonesii Pennell (P. Eatonii A. Gray × P. Laevis Pennell) (Plantaginaceae), W. Wesley Crump, Jason M. Stettler, Robert L. Johnson, Chris D. Anderson, Sarah Harrison, Lindsey M. Meservey, Mikel R. Stevens

Western North American Naturalist

Penstemon × jonesii is described as having flowers with the colors of “Tyrian rose,” “amaranth purple,” or “red-purple to maroon.” It has been recorded only in localized areas of southwestern Utah and just over the border of Arizona, where both putative parents commonly occur in sandy soils. Penstemon × jonesii has been reported and widely accepted as a natural hybrid of P. laevis × P. eatonii, though no research has been conducted to verify this assumption. We examined claims of its hybrid origin by making interspecific reciprocal first-generation hybrid plants from the 2 suspected parental species (P. eatonii …

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