Variability, Distribution, and Systematics of Pyrola picta s.l. (Ericaceae) in Western North America

Haber, E. S.

doi:10.2307/2419328

Cited by 16 publications

(28 citation statements)

References 13 publications

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“…Extreme phenotypic variation in the P. picta species complex, especially with regard to leaf characteristics, has provoked discussion among botanists for more than 100 years. This wide range of variation within and among species caused previous workers (Camp, 1940;Haber, 1987) to conclude that the P. picta species complex represented a single, very polymorphic species, but more recent genetic work (Jolles & Wolfe, 2012) highlights the misleading effects of intergrading polymorphism, revealing multiple, discrete phylogenetic species rather than one. Pyrola crypta does not exhibit the range of phenotypic variability that is so confusing in P. picta, P. dentata, and P. aphylla across the large ranges of these species.…”

Section: Discussionmentioning

confidence: 99%

“…Taxonomists could agree that section Scotophylla contains the three taxa described by Smith (Copeland, 1947;Křísa, 1971), but they debated whether these taxa were reproductively isolated and should be considered species. Pyrola aphylla and P. dentata have since been treated as subspecies or forms of a single species, P. picta, based on wide intraspecific ranges in leaf morphology, relatively minute interspecific differences in floral morphology, and the observation that all three species grow sympatrically in some parts of their collective geographic range (Camp, 1940;Copeland, 1947;Haber, 1987). Each taxon, however, can be identified in the field and in herbarium collections based on leaf size, shape, and coloration ( Fig.…”

Section: Introductionmentioning

confidence: 99%

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Pyrola crypta: A Pacific Northwest species belonging to the Pyrola picta species complex

Wilson

2014

TAXON

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A new species of Pyrola was discovered from the Pacific Northwest Physiographic Province of western North America. This new species belongs to the Pyrola picta species complex (section Scotophylla), comprising the closely related P. picta, P. dentata, and P. aphylla. The new species shares a similar habitat with other members of the species complex, but differs in that its geographic range is restricted to the Pacific Northwest. The other species have wider ranges throughout montane western North America. Although the new species is phylogenetically sister to P. dentata, it is nearly indistinguishable morphologically from P. picta, which poses a challenge to species diagnosis. Phylogenetic analyses based on genetic markers from the chloroplast and nuclear genomes show no evidence of recent hybridization between the new species and any of its close congeners. Additionally, morphometric analyses show that the new species has larger floral bracts and sepals relative to plants of P. picta, P. dentata, and P. aphylla from the same geographic region. We provide justification for recognizing a new species, P. crypta, and briefly discuss the importance of recognizing cryptic species.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pyrola crypta: A Pacific Northwest species belonging to the Pyrola picta species complex

Wilson

2014

TAXON

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“…Species within this subclade have been recognized as distinct in most treatments of the genus since they were originally described by Smith (1814) from collections made by Menzies on West Redonda Island off the coast of British Columbia (Don, 1824;Andres, 1914;Copeland, 1947;Křísa, 1971;Takahashi, 1987aTakahashi, , 1993Freudenstein, 1999). However, Munz & Keck (1959) and Haber (1987) recognized them as a single, highly variable species P. picta. Based on the similarity of their pollen and seed morphology, Takahashi (1986Takahashi ( , 1993 also recognized the close affinity of these three species.…”

Section: Discussionmentioning

confidence: 99%

A molecular phylogeny and a new classification ofPyrola(Pyroleae, Ericaceae)

Liu

Zhou

Liu

et al. 2010

TAXON

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The northern temperate genus Pyrola L. is the largest and arguably the most taxonomically complex element in the tribe Pyroleae (Ericaceae). Here we present a molecular phylogenetic study with extensive sampling comprising 26 ingroup and 7 closely related taxa. The results, based on parsimony and Bayesian analyses of nuclear (ITS) and chloroplast (atpB‐rbcL, trnS‐trnG, trnL‐trnF) DNA sequences, add substantially to our understanding of relationships within this diverse group and call for taxonomic changes. Pyrola is confirmed as a monophyletic group with two redefined sections and six series: P. sect. Pyrola (P. ser. Pyrola, ser. Ellipticae and ser. Rugosae) and P. sect. Scotophylla (P. ser. Japonicae, ser. Scotophyllae and ser. Chloranthae). Members of each respective section and series share similar morphological traits and/or geographical distributions. For the potential hybrids P. media and P. faurieana, the maternal donor was identified by their close affinity to P. minor in the chloroplast trees whereas the paternal donor remained unclear.

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“…Leaf morphology varies with environment: in dry sites, leaves have more epicuticular waxes, smooth margins, more stomata on the lower surface, and two layers of palisade cells (Copeland 1947, Haber 1987. Leaf morphology varies with environment: in dry sites, leaves have more epicuticular waxes, smooth margins, more stomata on the lower surface, and two layers of palisade cells (Copeland 1947, Haber 1987.…”

Section: Study Speciesmentioning

confidence: 99%

“…Leaf morphology varies with environment: in dry sites, leaves have more epicuticular waxes, smooth margins, more stomata on the lower surface, and two layers of palisade cells (Copeland 1947, Haber 1987. Inflorescences contain up to 25 flowers (Haber 1987) and, although plants flower frequently, seedling establishment is rare (C. R. Nelson, personal observation). Inflorescences contain up to 25 flowers (Haber 1987) and, although plants flower frequently, seedling establishment is rare (C. R. Nelson, personal observation).…”

Section: Study Speciesmentioning

confidence: 99%

Variation in Responses of Late-Seral Herbs to Disturbance and Environmental Stress

Nelson

Halpern

Antos

2007

Ecology

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Clonal herbs that attain maximum development in late-seral forest are often assumed to have similar responses to disturbance and to be functionally equivalent. However, little is known about the demographic or physiological responses of these plants to disturbance or to the altered conditions of the post-disturbance environment. Following harvest of a mature coniferous forest, we compared abundance, demographic changes, and physiological acclimation of three clonal herbs (Asarum caudatum, Clintonia uniflora, and Pyrola picta) that differ in belowground morphology and leaf longevity. We measured ramet density, leaf area, and demographic variables (survival, clonal growth, flowering, and seedling establishment) before and for two years after harvest, and in adjacent undisturbed forest. Acclimation to increased solar radiation was assessed two years after harvest by measuring leaf mass per unit area (LMA) and chlorophyll a:b ratios of leaves produced in the current year. Although initial declines in abundance were similar, demographic responses indicate that patterns of recovery varied greatly among species. Two years after logging, ramet survival and clonal growth (production of new ramets) of Clintonia were greater in the harvest area than in the forest. Asarum had lower survival in the harvest area, but greater clonal growth, and Pyrola showed no difference in either survival or growth between environments. Only Asarum produced seedlings, although their survival was low in the harvest area. All species had higher LMA in the harvest area, but only Clintonia (with annual leaves) had a higher chlorophyll a:b ratio, suggesting the greatest potential for acclimation to increased light. Our results demonstrate that forest herbs with greater rhizome plasticity and shorter leaf duration have greater potential to acclimate after disturbance than those with rigid architectures and persistent leaves. Thus, species with comparable successional roles can vary substantially in their demographic and physiological responses to disturbance, with potential consequences for long-term recovery.

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Variability, Distribution, and Systematics of Pyrola picta s.l. (Ericaceae) in Western North America

Cited by 16 publications

References 13 publications

Pyrola crypta: A Pacific Northwest species belonging to the Pyrola picta species complex

Pyrola crypta: A Pacific Northwest species belonging to the Pyrola picta species complex

A molecular phylogeny and a new classification ofPyrola(Pyroleae, Ericaceae)

Variation in Responses of Late-Seral Herbs to Disturbance and Environmental Stress

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