Peter Hoch - Profile on Academia.edu (original) (raw)

Papers by Peter Hoch

Genome Announcements, Mar 9, 2017

Phytologia, 1992

Evidence from independent analyses of morphological and molecular variation in tribe Epilobieae s... more Evidence from independent analyses of morphological and molecular variation in tribe Epilobieae shows no support for the continued recognition of Boisduvalia Spach. Absence of seed comas, the only consistent diagnostic feature of the genus relative to EpUobium, now appears to be a secondary loss; other characters reveal a close relationship of Boisduvalia to taxa within Epilobtvm. Therefore, all species of Boisduvalia are transferred to EpUobium, in order better to reflect phylogeny.

(1603-1605) Proposals to conserve the name Ludwigia repens (Onagraceae ) with a conserved type, and to reject the names Potamogeton oblongifolium and P. rotundifolium (Potamogetonaceae ), all published in Forster’s 1771 Flora Americae Septentrionalis

Taxon, Nov 1, 2003

... petiolatis, was a detailed description by Clayton: "Ludvigia parva aquatica repens: caul... more ... petiolatis, was a detailed description by Clayton: "Ludvigia parva aquatica repens: caule succu-lento glabro rubente: floribus ex alis foliorum egressis dilute luteis, tetrapetalis, fugacissimis, vix conspicuis: foliis rubentibus venosis glabris lucidis, ad sinem rotundis, ex ... N-cent. ...

Genome Announcements, Dec 29, 2016

Here, we present the first plastome of Ludwigia octovalvis (Onagraceae, Myrtales) as well as the ... more Here, we present the first plastome of Ludwigia octovalvis (Onagraceae, Myrtales) as well as the first plastome in the subfamily Ludwigioideae. This genome is notable for its contracted inverted repeat regions and an expanded small single-copy region compared to other species in the orders Myrtales and Geraniales.

Viscin threads on pollen of Circaea ×intermedia Ehrh. (Circaeeae: Onagraceae)

Taxon, Feb 1, 2005

Viscin threads are here described for the exine of Circaea ×intermedia Ehrh. (C. alpina L. × C. l... more Viscin threads are here described for the exine of Circaea ×intermedia Ehrh. (C. alpina L. × C. lutetiana L.). Often, the threads bifurcate, taper distally and have branched terminal ends. The smooth surface has lightly sculptured bands and randomly occurring and positioned sporopollenin globules. At the point of attachment with the exine the threads show either a natural transition with exine surface elements or have bulblike enlargements. Circaea ×intermedia viscin threads present a remarkable contrast to the generally poorly defined viscin threads on Circaea pollen.

Oecologia, 1974

Nectar foraging preferences of Colias butterflies in two different mountain ecosystems are examin... more Nectar foraging preferences of Colias butterflies in two different mountain ecosystems are examined with respect to plant distribution, nectar quantity, carbohydrate (and amino acid) content of nectar, and visual pattern of the plants utilized and avoided. Colias, and apparently numerous other smMl, eetothermic, low-energy-demand pollinators, "patronize" plants producing relatively dilute nectars containing a high proportion of monosaccharide sugars and significant amounts of polar, nitrogen-rich amino acids. These plants also converge on a common "target" flower pattern in ultraviolet and human-visible light. High-energy demand, endothermic pollinators, by contrast, appear to require higher concentration nectars and/or higher proportions of di-and oligosaecharide sugars. These results are discussed in the light of water balance and energy budget demands of different pollinator classes. Questions are also raised concerning behavioral aspects of pollinator search for resources and the pertinence of these data to the concept of floral mimicry.

American Journal of Botany, May 1, 2018

Polyploidy has long been recognized as an important evolutionary force in the history of plants .... more Polyploidy has long been recognized as an important evolutionary force in the history of plants . Indeed, the majority of angiosperms have apparently experienced polyploid speciation at some point in their history . Numerous studies have been conducted in an effort to unravel the complex relationships and origins of polyploids in a diverse range of plant groups, and general modes of polyploid evolution-for example, whether they are autopolyploids or allopolyploids and the fact that many polyploids have multiple origins-are increasingly becoming more well understood (

Annals of the Missouri Botanical Garden, Jun 26, 2020

While it is known that whole genome duplication (WGD) and reticulate evolution play important rol... more While it is known that whole genome duplication (WGD) and reticulate evolution play important roles in plant evolution, the origins and evolutionary histories of most polyploid and reticulate groups are still poorly known. The North Temperate haplostemonous (NTH) Ludwigia L. (sections Isnardia (L.) W. L. Wagner & Hoch, Ludwigia, Microcarpium Munz, and Miquelia P. H. Raven) group, characterized by having 4-merous and haplostemonous flowers, pluriseriate and free seeds, glabrous and convex nectaries, and a north-temperate distribution, is a polyploid complex (23, 43, 63, and 83) of 24 species with frequent reports of inter-and intrasectional hybridization. Although earlier biosystematics studies postulated some evolutionary scenarios and recent molecular phylogenetic studies have partially tested these propositions, the full history of their reticulate evolution remains puzzling. In this study, we sequenced four chloroplast regions (rpL16, rpoB-trnC, trnL-trnF, and ycf6-psbM) and conducted extensive molecular cloning of the biparentally inherited single-copy nuclear PgiC gene (376 clones in total), sampling 23 of the 24 NTH Ludwigia species whose chromosome numbers and ploidy levels were confirmed. Both the chloroplast and PgiC trees include strongly supported sister clades of section Ludwigia (four diploid species) and the "Microcarpium complex" (composed of sections Isnardia, Microcarpium, and Miquelia), which together are sister to the rest of Ludwigia. In the PgiC tree, eight clades are identified within the Microcarpium complex, with four clades including no extant diploid species. Neither sections Isnardia nor Microcarpium are monophyletic, while the monospecific section Miquelia has a hybrid origin. By integrating our phylogenetic trees with previous cytological hypotheses, the reticulate evolution of NTH Ludwigia is disentangled and four to eight extinct diploid species are inferred. Ancestral area reconstruction supports a North American origin of L. ovalis whose current East Asian distribution reflects a relict of the Arcto-Tertiary Geoflora. Based on our results, we propose to synonymize sections Microcarpium and Miquelia under the expanded section Isnardia.

Annals of the Missouri Botanical Garden, 1997

Annals of the Missouri Botanical Garden, Jun 18, 2008

BioOne sees sustainable scholarly publishing as an inherently collaborative enterprise connecting... more BioOne sees sustainable scholarly publishing as an inherently collaborative enterprise connecting authors, nonprofit publishers, academic institutions, research libraries, and research funders in the common goal of maximizing access to critical research.

Experimental and Molecular Approaches to Plant Biosystematics

The Bryologist, 1997

American Journal of Botany, Jul 1, 2021

HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific re... more HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

A Corrected Name in North American Epilobium (Onagraceae)

Harvard Papers in Botany, Jun 30, 2022

The importance of vouchers in science

Brittonia, Dec 1, 2008

Aperture morphology of tetrad pollen of Epilobium luteum (Onagraceae: Epilobieae) from three Alas... more Aperture morphology of tetrad pollen of Epilobium luteum (Onagraceae: Epilobieae) from three Alaskan collections is highly variable. The first collection appears to lack apertures altogether and is presumed to consist of immature pollen gains in a genus known to achieve mature size before the apertures become distinctly protruding. A second collection has tetrads with 3-and 4-apertured grains, the apertures in the latter are often irregularly spaced and not in apposition with the apertures of neighboring members. The third collection consists of the more typical 3-apertured members that characterize the majority of Epilobium pollen grains. In all of these collections individual pollen grains (monads) are interspersed among the tetrads. The variations in the number of apertures emphasize the importance of having a comprehensive understanding of the stage of development of the pollen (taxon) examined when describing pollen collections. In the first collection this would mean the recognition that in Onagraceae apertures occur in the later stages of microspore ontogeny. In the latter two collections a thorough background of the literature of the pollen morphology on this largest Onagraceae taxon is useful for the understanding of the significance of a range of aperture numbers on Epilobium pollen grains.

Recent molecular phylogenetic analyses in the plant family Onagraceae support the need for revisi... more Recent molecular phylogenetic analyses in the plant family Onagraceae support the need for revisions in the family classification. In this paper we briefly survey the history of generic and suprageneric classification in Onagraceae, summarize our knowledge of the morphological and molecular variation in the family in a phylogenetic context, and propose a revised classification that reflects that phylogeny. We include a specieslevel synopsis of the family, incorporating all nomenclatural changes and combinations but not full species-level synonymy. We provide descriptions of all taxa recognized for the first time, as well as tribes, genera, sections, subsections, and series. In this treatment, we recognize 22 genera in the family, subdivided into two subfamilies, subfam. Ludwigioideae (only Ludwigia) and subfam. Onagroideae (the other genera), and the latter into six tribes, two with only one genus each, three with two genera each, and one (tribe Onagreae) with 13 genera. Chromosome numbers and breeding system information are summarized, as is the geographical and ecological distribution of each taxon. For each group we list the included taxa. Many changes involve the tribe Onagreae, from which we have segregated Gongylocarpus as its own tribe, sister to the tribes Epilobieae and Onagreae, and within which we propose changes in the delimitation of Camissonia and Oenothera. Camissonia as currently defined is broadly paraphyletic; our new classification recognizes nine generic lineages (Camissonia, Camissoniopsis, Chylismia, Chylismiella, Eremothera, Eulobus, Holmgrenia, Taraxia, and Tetrapteron), which in part form a grade at the base of Oenothera. Each of these lineages is well-supported by morphological and molecular data. In contrast, molecular and morphological data both suggest the need to broaden the delimitation of Oenothera to include Calylophus, Gaura, and Stenosiphon. This redefined Oenothera, strongly supported by molecular data, is marked by at least two morphological synapomorphies: the presence of an indusium on the style, and a lobed or peltate stigma. We summarize these new generic alignments and review the morphological characters used to diagnose all tribes, genera, and sections. New taxa recognized include subfamilies Ludwigioideae and Onagroideae, two genera (Camissoniopsis and Holmgrenia), three sections (Epilobium sect. Macrocarpa, Oenothera sect. Leucocoryne, and O. sect. Xanthocoryne), and one subspecies (O. macrocarpa subsp. mexicana). All other nomenclatural novelties involve new combinations or new names; these include three genera (Chylismiella, Eremothera, and Tetrapteron), 23 sections or subsections (Chylismia sect. Lignothera; Clarkia sect.

(1159) Proposal to reject the name Epilobium alpinum L. (Onagraceae)

Taxon, May 1, 1995

... His interpretation was followed by several others, including Brit-ton & Brown (Ill. Fl. N... more ... His interpretation was followed by several others, including Brit-ton & Brown (Ill. Fl. NUS2: 482. 1897; ed. 2, 2: 591. 1913), Rydberg (Fl. Rocky Mts.: 588. 1917), and Fernald (in Gray, Manual, ed. 8: 1062. 1950). 238 Page 3. TAXON 44 - MAY 1995 ...

XML Treatment for Ludwigia L. sect. Jussiaea (L.)

PhytoKeys, May 27, 2015

In 1953, Hara provided new combinations for many sectional and species names when he combined Jus... more In 1953, Hara provided new combinations for many sectional and species names when he combined Jussiaea L. with Ludwigia L., and at the time, Ludwigia sect. Oligospermum (Micheli) H.Hara was the correct name for one well-defined section. However, subsequent changes to/clarifications of the botanical code have necessitated a change for that name in that now an autonym is treated as having priority over the name or names of the same date and rank that established it. Since Hara's combination was based on Jussiaea sect. Oligospermum Micheli, the correct name for this section is Ludwigia sect. Jussiaea (L.

Onagraceae: Evening-Primrose Family