Rhodora最新文献

{"title":"NEBC Meeting News","authors":"Bryan Hamlin Recording Secretary","doi":"10.3119/0035-4902-122.991.242","DOIUrl":"https://doi.org/10.3119/0035-4902-122.991.242","url":null,"abstract":"January 2020. The New England Botanical Club met at the Field Headquarters of the Division of Fisheries and Wildlife in Westborough, Massachusetts, on January 11, 2020, for its 1143 meeting entitled ‘‘20th Assembly of Associates’ Appetizing Alimentary Acquisitions and Amazing Apparitions of Angiosperms.’’ It was the annual meeting where members share a potluck dinner, raffle, and presentations by members on botanical adventures from the last year. The potluck dinner was again delicious with an assortment of breads, salads, main dishes, and desserts, sporting labels that identified their ingredients using botanical scientific names. This year’s raffle was the largest ever with more than 75 items donated. Many of the books from a retiring botanist’s library were excitedly won by one of the younger members of the Club. Seven NEBC members gave show-and-tell presentations. Richard Primack started the evening with a presentation on a beautiful and highly variable species, swamp rose mallow (Hibiscus moscheutos), which has become common along the banks of the Charles River in Newton, Massachusetts, and towns further upstream. Populations are noteworthy for the extraordinary variability in flower form. All flowers within a plant look the same, but different plants vary dramatically in flower size, color (white to light pink to dark pink), petal shape (narrow or broad), and presence or absence of a red bull’s eye in the center of the flower. This range of variation is found within each population examined along the Charles River, and the variation in size is evident in herbarium specimens measured from across the United States. Cultivated rose mallow plants grown as ornamental plants in Boston have larger flowers, broader petals, and a greater frequency of white flowers and red bull’s eye flowers than plants in the wild. What remains unknown is the adaptive significance of this floral variation to plants in the wild. Keith Williams described surveys of three remote lakes in the Maine Allagash Wilderness, assisted by Sibyl French, Dennis Roberge, Bunny Wescott, and Mark Whiting in late July and early August 2019. Allagash Pond, northwest of the larger Allagash Lake, and Round Pond and Daggett Pond, both south of Allagash Lake, are about 100– 500 acres in size and shallow (8–20 feet). Keith’s intent in surveying these boreal forest ponds, as he has been doing for 20 years, is to inventory the aquatic plants, their prevalence, and correlations with water chemistry (samples collected for Environmental Protection","PeriodicalId":54454,"journal":{"name":"Rhodora","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2021-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47680454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Grasses, Sedges, Rushes: An Identification Guide","authors":"L. Standley","doi":"10.3119/0035-4902-122.991.234","DOIUrl":"https://doi.org/10.3119/0035-4902-122.991.234","url":null,"abstract":"Lauren Brown and Ted Elliman have produced a delightful update to her 1979 Grasses: An Identification Guide. The new book retains the original organization, keys, descriptions, and fluid line drawings, with the addition of photographs, updated text and nomenclature, and a few new species (Microstegium, among others). This is an outstanding field guide for botanists who have been afraid to dip their toes into the world of wind-pollinated linear-leaved plants, featuring common species, simple keys, and clear illustrations. The book covers the northeastern United States, from Maine to Minnesota and south to Delaware and Iowa, with an updated and expanded introductory essay on the ecology and history of the American prairie. For the most part, the book is organized by species, rather than by families or genera. There are comprehensive descriptions of the Juncaceae and of a few genera (Carex, Bromus, Dichanthelium, Setaria). The simple keys lead to a short list of similar-appearing species, which then requires the user to compare the full-page treatments. A hand lens is useful but not necessary for most species. Once species are identified, the user can begin to build concepts of genera and families. All of the major genera of Cyperaceae are included, although most feature only a single species. Carex (with over 200 species in the region covered) is represented by 14 species treated in depth. Six species of Juncus and one Luzula are included. The most comprehensively covered family is the Poaceae. The more than 90 species illustrated include the major cultivated cereal grains and most common species. Since the order of species follows the keys, species in the same genus may be separated (for example, Leersia virginica is on p. 98, L. oryzoides on p. 151), making it sometimes a little difficult to develop a generic concept or compare congeners. The book also includes some linear-leaved wind-pollinated nongraminoids (Plantago, Typha, Sparganium, Equisetum) that may be confusing to the beginner. The end material includes useful lists of species by habitat, flowering times, and size. There is an improved and expanded section on what to do if the user fails to identify a species (‘‘If You Do Not Find Something in This Book’’), and a good up-to-date list of references for","PeriodicalId":54454,"journal":{"name":"Rhodora","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2021-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43421136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New England Botanical Club Les Mehrhoff Botanical Research Award","authors":"L. Mehrhoff","doi":"10.3119/0035-4902-122.991.238","DOIUrl":"https://doi.org/10.3119/0035-4902-122.991.238","url":null,"abstract":"The Les Mehrhoff Botanical Research Award was established in 2014 by the New England Botanical Club in memory of renowned botanist, NEBC Herbarium Curator, and long-time supporter of the New England Botanical Club, Dr. Leslie J. Mehrhoff. The award supports botanical endeavors of the sort that Les championed: field studies and herbarium, library, and archival research. The objective of NEBC in offering the award is to add to our understanding of the flora of New England and floristically related regions. Projects for which traditional funding (such as academic grants and in-house agency support) is difficult to secure are favored. The Les Mehrhoff Botanical Research Committee is pleased to announce that the four winners of the 2020 award are Sarah Bois for her project entitled ‘‘Naturalized Scotch Broom (Cytisus scoparius) on Nantucket, Massachusetts: Assessing the extent of the problem,’’ James Graves for his project entitled ‘‘Conserving the Green Mountain College Herbarium, Vermont,’’ Christopher Mangels for his project entitled ‘‘A search for populations of Provancher’s fleabane (Erigeron philadelphicus var. provancheri) along the Housatonic River in Connecticut and Massachusetts,’’ and Jennifer Pye and Melissa Cullina for their project entitled ‘‘Investigation and assessment of the herbarium specimens of the Monhegan Museum, Maine.’’ More information on the Les Mehrhoff Botanical Research Award is available on the Club’s web page.","PeriodicalId":54454,"journal":{"name":"Rhodora","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2021-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41932034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Harold George Brotzman (1941–2020)","authors":"C. Barre Hellquist","doi":"10.3119/0035-4902-122.991.240","DOIUrl":"https://doi.org/10.3119/0035-4902-122.991.240","url":null,"abstract":"","PeriodicalId":54454,"journal":{"name":"Rhodora","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2021-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44973322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New England Botanical Club Graduate Student Research Awards","authors":"","doi":"10.3119/0035-4902-122.991.237","DOIUrl":"https://doi.org/10.3119/0035-4902-122.991.237","url":null,"abstract":"","PeriodicalId":54454,"journal":{"name":"Rhodora","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2021-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47176987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Declining Native Species Richness in Natural Areas in Eastern North America: An Example from Baker Woodlot in Central Michigan","authors":"M. Kolp, Matthew T. Chansler, G. Crow, L. A. Prather","doi":"10.3119/20-13","DOIUrl":"https://doi.org/10.3119/20-13","url":null,"abstract":"ABSTRACT. Natural areas are intended to preserve biodiversity and understanding how well they fulfill this role is crucial as pressure from anthropogenic disturbances like habitat loss increases. We re-inventoried the flora of Baker Woodlot in East Lansing, Michigan, 40 years after an initial study to document changes in community composition. Both inventories were based on vascular plant collections vouchered by specimens and deposited in the Michigan State University Herbarium. We compared results with 10 similar floristic change studies in northeastern North America to understand patterns in species turnover, accounting for gains and losses of natives and nonnatives. In Baker Woodlot and across the comparable studies, total richness stability masked a consistent pattern of native losses and nonnative gains. In Baker Woodlot, total richness increased marginally (3%; 11 species), reflecting a net loss of 19 natives and a gain of 30 nonnatives. Across the comparable studies, richness increased by 3.6%, but seven native species were lost per decade on average. Nonnative turnover was higher compared to native turnover and positively correlated with time between inventories. Despite net loss of natives, Baker Woodlot experienced only a slight decline in floristic quality. Baker Woodlot remains a high-quality beech-maple forest, which is a prominent component of Michigan's biodiversity. Species richness alone does not adequately address biodiversity concerns. In Baker Woodlot and comparable forests, natives are being replaced by nonnatives.","PeriodicalId":54454,"journal":{"name":"Rhodora","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2021-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42837011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rediscoveries of Dichanthelium scoparium (Poaceae) in Southern New England and Evaluation of Past Records from New England and New York","authors":"Amanda K. Weise, Peter P. Grima, Matthew Charpentier, Margaret Curtin, G. Palermo","doi":"10.3119/20-24","DOIUrl":"https://doi.org/10.3119/20-24","url":null,"abstract":"ABSTRACT. Dichanthelium scoparium (Poaceae) is a robust, rhizomatous panic-grass of the eastern United States. Most common in the southeast, it is considered rare in New York and had not been observed in New England since 1931. In recent years, we have discovered four new populations in Massachusetts and Rhode Island, reestablishing the species as extant in New England. To establish context for these discoveries, we evaluated past records from New England and New York, principally by inspecting digital images of voucher specimens, relying on the readily discernible diagnostic characters of the species. Using the subset of 22 verified records, we elucidate the regional distribution of the species and discuss patterns of habitat and ecological processes that may affect its presence and persistence on the landscape.","PeriodicalId":54454,"journal":{"name":"Rhodora","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2021-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48584035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Taxonomic Position of Silene Multinervia (Caryophyllaceae), Endemic to California and Northwestern Mexico, and Description of Section Californicae, sect. nov.","authors":"D. Iamonico","doi":"10.3119/20-15","DOIUrl":"https://doi.org/10.3119/20-15","url":null,"abstract":"ABSTRACT. Molecular analyses and cytological data have shown that Silene multinervia, which has always been placed in section Conoimorpha and often regarded as a heterotypic synonym of S. coniflora, is a separate taxon in a distinct clade. A comparison between S. multinervia and the members of section Conoimorpha is provided, showing that the species can be distinguished by both vegetative (plant height) and reproductive (flower number per inflorescence, calyx vein number, calyx length, petal apex shape, fruit length, carpophore length, and seed diameter) characters. Cytological, molecular, and morphological evidence support recognition of S. multinervia as a member of a new section endemic to southwestern California and northwestern Mexico (Baja California). Therefore, Silene sect. Californicae, sect. nov. (type: S. multinervia) is here proposed.","PeriodicalId":54454,"journal":{"name":"Rhodora","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2021-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42568627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lycopus americanus subsp. Laurentianus (Lamiaceae): An Eastern Canadian Endemic Taxon New to the United States","authors":"S. Bailleul, Frédéric Coursol","doi":"10.3119/20-22","DOIUrl":"https://doi.org/10.3119/20-22","url":null,"abstract":"ABSTRACT. A new status for Lycopus laurentianus is proposed: Lycopus americanus subsp. laurentianus, and the taxon is newly reported from the United States with occurrences in Maine, New Hampshire, New York, and Vermont. Six occurrences in Vermont and three in New York were discovered on the shores of Lake Champlain in 2007. Subsequent review of L. americanus specimens from herbaria yielded more occurrences of L. americanus subsp. laurentianus in New York and Vermont, as well as new occurrences in New Hampshire and in Maine. Important publications and data previously available only in French of this relatively obscure taxon are also presented. Nutlet morphology is presently the only reliable diagnostic character separating L. americanus subsp. laurentianus from L. americanus subsp. americanus.","PeriodicalId":54454,"journal":{"name":"Rhodora","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2021-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47461396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Inside back cover.","authors":"","doi":"10.1039/d1lc90056k","DOIUrl":"https://doi.org/10.1039/d1lc90056k","url":null,"abstract":"","PeriodicalId":54454,"journal":{"name":"Rhodora","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2021-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1039/d1lc90056k","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57834889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}