Rhodora最新文献

{"title":"Graduate Student Research Awards","authors":"Michael LaScaleia, Madeleine Meadows-McDonnell, Amber Stanley","doi":"10.3119/0035-4902-123.995.364","DOIUrl":"https://doi.org/10.3119/0035-4902-123.995.364","url":null,"abstract":"The award will be used to aid in collection of specimens, in visiting herbaria, and in collection of preliminary data for a research project that 1) uses an explicitly phylogenetic approach to help identify relationships among species and limits between putative species among Myriophyllum; and 2) uses the phylogenetic hypotheses to a) examine the limits and evolution of plasticity in the “North American” clade and b) investigate the role of hybridization in this prolific invasive species.","PeriodicalId":54454,"journal":{"name":"Rhodora","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41322266","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":"An established Nuphar advena (Nymphaeaceae) in Massachusetts, U.S.A.","authors":"D. Padgett, Jenna E. Mendell, Carilyne Ricardo Carbonell","doi":"10.3119/22-21","DOIUrl":"https://doi.org/10.3119/22-21","url":null,"abstract":"Nuphar advena (Ait.) Ait. f. (Nymphaeaceae) is common and widespread in waters of the eastern United States south of New England with four recognized subspecies (Padgett 2007). Occurrences in the northeastern United States represent the more widespread, typical subspecies (subsp. advena [Padgett 2007]). In New England, this taxon is of conservation concern as Division 2, Regionally Rare (Brumback and Gerke 2013) and currently state-listed as Special Concern in Connecticut (believed extirpated) and Maine (Connecticut Department of Energy and Environmental Protection 2015; Maine Natural Areas Program 2021). Maine occurrences represent highly disjunct populations for the species (Padgett 2007). As part of an aquatic plant identification course, a collection was submitted which contained an unusual Nuphar specimen for Massachusetts, initially identified as the native N. variegata Dur. The leaf had a rounded petiole and divergent basal lobes— features which do not align with N. variegata. To assess the peculiar population, we visited the collection site the following season. Plants growing in this waterbody were determined to be N. advena based on terete petioles and emersed blades (>60 cm above water surface) with greatly divergent lobes (Figure 1). Also consistent with N. advena, the innermost sepals were green on their adaxial surfaces. These plants, previously not known to exist in Massachusetts, were growing throughout the southern shore of the Blue Hills Reservoir (42.22855, −71.05067) in the Blue Hills Reservation. The newly discovered Massachusetts population is well-established, individuals abundant, and all notably robust in size. At the time of observation, plants were flowering and possessed mature fruits. They exhibited the leaf habit typical of freshwater tidal waters with leaf blades positioned in a vertical orientation, parallel with the erect petioles. How the species reached the reservoir is unknown to us, but the history of the site strongly suggests a deliberate introduction. The Blue Hills Reservoir was initially constructed in the 1950s. From 2007–2010, it was completely reconstructed by the Massachusetts Water Resources Authority as part of a water storage project which eliminated the eastern half of the original reservoir (Massachusetts Water Resources Authority 2009). A review of satellite imagery from 2007–2008 (Google Earth Pro 2022) showed the basin was dry during construction. The area was proposed to be re-vegetated as part of the site-enhancement activities of the project (Massachusetts Water Resources Authority","PeriodicalId":54454,"journal":{"name":"Rhodora","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47327452","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":"Quercus prinoides (Fagaceae) hybrids in the Capitan Mountains of New Mexico, U.S.A.","authors":"P. Thomson","doi":"10.3119/21-21","DOIUrl":"https://doi.org/10.3119/21-21","url":null,"abstract":"The chinquapin oaks, Quercus prinoides Willd. and Quercus muehlenbergii Engl., are known to hybridize with each other as well as other members of the white oak subgenus throughout their occurrence in the eastern United States (Tirmenstein 1991). However, Tucker (1961) postulated that Q. muehlenbergii and five other oak species that hybridized with Q. gambelii Nutt. in the southwestern United States were the sources of variation in a group of variable populations, of apparent hybrid origin, that he called the Q. undulata Torr. complex. Quercus muehlenbergii is unique in the complex as the only member whose main occurrence is in the widely separated forests of the eastern and central United States. While Tucker studied the effects of hybridization on Q. undulata, it is possible that hybridization has affected the chinquapin oaks as well, both morphologically and in such features as habit or soil preference. Today, taxonomists treat the chinquapin oaks as two taxa but disagree on the appropriate rank; a single species with two varieties (Burger 1975; Gleason 1963; Mohlenbrock and Thomson 2009; Steyermark 1963) or two species, as in Flora of North America (Nixon and Muller 1997), with Quercus prinoides a shrub and Q. muehlenbergii a tree. In this paper I refer to the chinquapin oaks as a single species, Q. prinoides. Disjunct populations of Quercus prinoides occurring in New Mexico and western Texas were examined as part of a study of the species status of the chinquapin oaks (Thomson 1978). During that study, evidence of hybridization between Q. prinoides and two members of the Q. undulata complex was discovered in the Capitan Mountains of New Mexico. Results of that study are presented here.","PeriodicalId":54454,"journal":{"name":"Rhodora","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47335101","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":"Junior Faculty Award on the Flora of New England","authors":"K. Coe","doi":"10.3119/0035-4902-123.995.366","DOIUrl":"https://doi.org/10.3119/0035-4902-123.995.366","url":null,"abstract":"","PeriodicalId":54454,"journal":{"name":"Rhodora","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69625477","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":"Chromosome number determinations in Solidago brendae, S. canadensis, S. fallax, and S. lepida (Asteraceae: Astereae)","authors":"J. Morton, Joan Venn, J. C. Semple","doi":"10.3119/22-02","DOIUrl":"https://doi.org/10.3119/22-02","url":null,"abstract":"ABSTRACT Chromosome numbers are reported for 177 individuals of Solidago brendae, S. canadensis, S. fallax, and S. lepida. Chromosome numbers of 2n = 36 and 2n = 54 for S. fallax var. molina are first reports for this taxon.","PeriodicalId":54454,"journal":{"name":"Rhodora","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69626508","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":"Merritt Lyndon Fernald Award","authors":"","doi":"10.3119/0035-4902-123.995.362","DOIUrl":"https://doi.org/10.3119/0035-4902-123.995.362","url":null,"abstract":"","PeriodicalId":54454,"journal":{"name":"Rhodora","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46753852","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":"Taxonomic studies in the Miconieae (Melastomataceae). XVI. Revision of Miconia sect. Echinatae","authors":"W. Judd, Eldis R. Bécquer, L. Majure","doi":"10.3119/20‒35","DOIUrl":"https://doi.org/10.3119/20‒35","url":null,"abstract":"ABSTRACT The recently recognized Miconia sect. Echinatae is characterized and revised. It includes 23 species previously recognized within Calycogonium, Clidemia, Leandra, and especially Ossaea. For each species, a detailed description, nomenclatural information, specimen citations, and eco-geographical characterization are presented, along with an identification key for the section. Section Echinatae likely represents a monophyletic group, the Paralima clade, within the Caribbean clade of Miconia s.l. (Melastomataceae: Miconieae) and is restricted to Cuba, Hispaniola, and Jamaica. It reaches its greatest diversity on Cuba, occurring in the western, central, and eastern regions of this island. The section can be diagnosed by a combination of characters—especially the mixture of multicellular, elongate, eglandular, bulla-based hairs and minute, globular-stellate hairs on the outer surface of the hypanthium, along with the 4-merous flowers with clavate-dendritic hairs on the adaxial surface of the calyx tube (and lobes) and strongly acute to acuminate petals. Most species also have bulla-based hairs and globular-stellate hairs on their abaxial leaf surfaces. In addition, these species lack the synapomorphies of the related sections Lima, Calycopteris, Calycodomatia, and Krugiophytum. Finally, Miconia garciabeltranii, M. joseluisii, and M. pseudopauciflora are newly described, and the new name M. cubapinetorum is provided for the species previously known as Ossaea pinetorum.","PeriodicalId":54454,"journal":{"name":"Rhodora","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69626497","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":"Apparent Hybridization of Nonnative Rhamnus Populations in Central New York and Connecticut, U.S.A.","authors":"Selma Rosenthal","doi":"10.3119/20-23","DOIUrl":"https://doi.org/10.3119/20-23","url":null,"abstract":"ABSTRACT The Eurasian Rhamnus cathartica is widespread, common, and naturalized in parts of the northeastern United States. Other nonnative buckthorn species are also present but underreported because intraspecific leaf polymorphisms, hybridization, and imprecise literature descriptions confuse identifications. A study of Rhamnus populations in Tompkins and Onondaga counties in New York and Hartford County in Connecticut provided an opportunity to revisit the literature and to propose identification aids based on infrequently reported fruit stone number and mature fruit pulp color. These characters facilitate inferences of ancestry of apparent hybrids involving R. cathartica, R. davurica, and R. utilis.","PeriodicalId":54454,"journal":{"name":"Rhodora","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43178087","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":"Hottonia palustris (Primulaceae): A Newly Documented Nonnative Aquatic Plant Species in New Hampshire, U.S.A.","authors":"W. Nichols, Amy P. Smagula, A. Haines, Douglas McGrady","doi":"10.3119/21-13","DOIUrl":"https://doi.org/10.3119/21-13","url":null,"abstract":"William F. Nichols1*, amy P. smagula2, arthur haiNes3, Douglas mcgraDy4 1New Hampshire Natural Heritage Bureau, Division of Forests and Lands Department of Natural and Cultural Resources, 172 Pembroke Rd., Concord, NH 03301 *William.Nichols@dncr.nh.gov 2Watershed Management Bureau, Department of Environmental Services 29 Hazen Dr., Concord, NH 03302-0095 3Native Plant Trust, 180 Hemenway Rd., Framingham, MA 01701 4940 Quaker Ln., Apartment 1419, Warwick, RI 02893","PeriodicalId":54454,"journal":{"name":"Rhodora","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42641943","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":"Aquatic and Wetland Flora of Fowler Lake, Buffalo National River, Arkansas, U.S.A.","authors":"C. Cheri, L. Kissoon, D. Bowles","doi":"10.3119/21-09","DOIUrl":"https://doi.org/10.3119/21-09","url":null,"abstract":"ABSTRACT Fowler Lake is a small reservoir atop Cave Mountain at the Buffalo National River in Arkansas, U.S.A. We report on the floristic community at this reservoir in addition to describing large floating vegetation mats that occur in this system and the mechanisms that allow their formation. In 2019, floristic surveys assessed 30 species of hydrophytes and helophytes representing 16 families and 26 genera. In addition to the speciose families Asteraceae, Cyperaceae, and Poaceae, the families Araceae and Polygonaceae were represented by three or more species. Six species observed at Fowler Lake represent new county records. Floristic surveys provide valuable information to assess ecological impacts and management decisions in areas like the Ozark Plateau, where relatively little work has been done on regional aquatic macrophytes. This study represents the first comprehensive floristic survey of Fowler Lake at the Buffalo National River and serves as a reference for continued study of that system and aquatic plants throughout the Ozark Plateau.","PeriodicalId":54454,"journal":{"name":"Rhodora","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43320799","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}