Pub Date : 2022-12-12DOI: 10.3119/0035-4902-123.995.366
K. Coe
{"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":"123 1","pages":"366 - 366"},"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}
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.
{"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":"123 1","pages":"345 - 352"},"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}
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.
{"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":"123 1","pages":"237 - 334"},"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}
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.
{"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":"123 1","pages":"105 - 132"},"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}
W. Nichols, Amy P. Smagula, A. Haines, Douglas McGrady
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
{"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":"123 1","pages":"221 - 228"},"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}
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.
福勒湖(Fowler Lake)是美国阿肯色州布法罗国家河(Buffalo National River)岩洞山(Cave Mountain)顶部的一个小型水库。本文报道了该水库的植物群落，并描述了该系统中出现的大型漂浮植被垫及其形成机制。2019年，植物区系调查评估了代表16科26属的30种水生植物和沼生植物。除了菊科、莎草科和禾本科外，天南星科和蓼科均有3种或3种以上的种。在福勒湖观测到的六个物种代表了新的县记录。植物区系调查为评估生态影响和管理决策提供了有价值的信息，如在奥扎克高原等地区，对区域性水生大型植物的研究相对较少。本研究代表了布法罗国家河福勒湖的第一次综合植物区系调查，并为继续研究该系统和整个奥扎克高原的水生植物提供了参考。
{"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":"123 1","pages":"133 - 148"},"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}
{"title":"First Report of Japanese Andromeda (Pieris japonica, Ericaceae) Escaped from Cultivation in Massachusetts, U.S.A.","authors":"George M. LoCascio","doi":"10.3119/21-11","DOIUrl":"https://doi.org/10.3119/21-11","url":null,"abstract":"","PeriodicalId":54454,"journal":{"name":"Rhodora","volume":"123 1","pages":"229 - 230"},"PeriodicalIF":0.2,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45921674","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}
R. Bertin, K. Searcy, G. Motzkin, M. Hickler, Peter P. Grima
ABSTRACT We examined changes in the native vascular flora of Franklin County, Massachusetts, a largely rural county with a long history of botanical investigation. The historical flora was documented using herbarium specimens and literature records, and the current flora was assessed in 10 years of field work starting in 2010. The county contains 26 towns, and apparent changes were based on town-level presence/absence. In total, 1205 species were recorded. Apparent losses from the historical flora totaled 5.6% of species, and apparent gains totaled 4.2%. Several families exhibited greater declines than the flora as a whole, including the Orchidaceae, Ophioglossaceae, Ranunculaceae, and Violaceae. Species dependent on fungi during at least part of their life cycle declined relative to other species, but were concentrated in a small group of families, including the Orchidaceae and Ophioglossaceae. Species with fleshy fruits increased relative to those with ant-dispersed seeds. Annuals increased relative to biennials and perennials, probably due to the increasing extent of ruderal habitats. Graminoids showed greater apparent increases than forbs, which may reflect undercollecting of the former taxa during the historical period. Species changes were related to habitat, with marked increases in plants of ruderal habitats, but other apparent changes may reflect sampling biases. Northern taxa appear to be declining relative to other species, particularly in towns at lower elevations. This study is one of several that have examined floristic changes in the northeastern United States and is part of a nascent literature suggesting that climate changes have altered the southern New England flora in the past century. Additional documentation of regional floras is needed to facilitate assessments of future floristic changes.
{"title":"Two Centuries of Change in the Native Flora of Franklin County, Massachusetts, U.S.A.","authors":"R. Bertin, K. Searcy, G. Motzkin, M. Hickler, Peter P. Grima","doi":"10.3119/21-18","DOIUrl":"https://doi.org/10.3119/21-18","url":null,"abstract":"ABSTRACT We examined changes in the native vascular flora of Franklin County, Massachusetts, a largely rural county with a long history of botanical investigation. The historical flora was documented using herbarium specimens and literature records, and the current flora was assessed in 10 years of field work starting in 2010. The county contains 26 towns, and apparent changes were based on town-level presence/absence. In total, 1205 species were recorded. Apparent losses from the historical flora totaled 5.6% of species, and apparent gains totaled 4.2%. Several families exhibited greater declines than the flora as a whole, including the Orchidaceae, Ophioglossaceae, Ranunculaceae, and Violaceae. Species dependent on fungi during at least part of their life cycle declined relative to other species, but were concentrated in a small group of families, including the Orchidaceae and Ophioglossaceae. Species with fleshy fruits increased relative to those with ant-dispersed seeds. Annuals increased relative to biennials and perennials, probably due to the increasing extent of ruderal habitats. Graminoids showed greater apparent increases than forbs, which may reflect undercollecting of the former taxa during the historical period. Species changes were related to habitat, with marked increases in plants of ruderal habitats, but other apparent changes may reflect sampling biases. Northern taxa appear to be declining relative to other species, particularly in towns at lower elevations. This study is one of several that have examined floristic changes in the northeastern United States and is part of a nascent literature suggesting that climate changes have altered the southern New England flora in the past century. Additional documentation of regional floras is needed to facilitate assessments of future floristic changes.","PeriodicalId":54454,"journal":{"name":"Rhodora","volume":"123 1","pages":"149 - 220"},"PeriodicalIF":0.2,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46491305","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}
Pub Date : 2022-10-31DOI: 10.3119/0035-4902-123.994.233
Karen Hirschberg
New England Botanical Club President Jesse Bellemare welcomed participants to the 1151st meeting on Saturday, April 3, 2021. He introduced the 2021 NEBC Distinguished Speaker, Dr. Robert I. Bertin, Professor of Biology, Emeritus, College of the Holy Cross, Worcester, Massachusetts. Dr. Bertin is currently studying the effects of recent climate change on flowering phenology and changes in the floristic composition of New England over time. He coauthored the Flora of Worcester County and more recently, the Flora of Franklin County, and has made major contributions to the understanding of floristic change in our region. Dr. Bertin’s presentation was titled “Regional Floras and the Assessment of Regional Change.” Published floras and herbarium collections are vital sources of historic data on plant distributions. Most herbarium specimens held at New England institutions can be viewed in digital form on the Consortium of Northeastern Herbaria website. The NEBC Herbarium has the most extensive collection of New England specimens, going back 200 years. MassWildlife’s Natural Heritage and Endangered Species Program (NHESP) is another valuable source, providing town occurrences of rare (state-listed) species. Dr. Bertin worked on the Franklin County Flora Project with Dr. Karen Searcy, Matt Hickler, Glenn Motzkin, and Pete Grima, with contributions from other botanists. They logged 46,000 field records, collected 4300 specimens, and examined 16,000 herbarium specimens and thousands of literature records. The resulting Flora of Franklin County includes 1205 native species and 635 nonnative species, with 67 historic species not found and 50 species documented that had not been reported historically. The highest diversity was found in the towns of the Connecticut River Valley. Dr. Bertin briefly described three collaborative floristic projects in which he is currently involved: 1) analysis of changes in the flora of Franklin County, 2) analysis of changes in rare species in Massachusetts that have northern affinities, and 3) changes in abundance of orchids. Dr. Bertin and collaborators examined changes in Franklin County species using an index based on the number of towns in which a species was recorded recently (since 2010) and historically (pre-2010). The median change index was modestly positive (0.18) for native species, presumably reflecting the greater intensity of recent than historical sampling, but much higher (0.52) for nonnative species, reflecting their increasing frequency. This increase in nonnative taxa could cause problems for insect herbivores— such as moths and butterflies—since other studies have shown lower diversity and abundance of these insects on nonnative plants. Dr. Bertin and collaborators looked at changes in native species in different habitat types. A large apparent increase in species of aquatic habitats was probably an artifact of the more thorough sampling of these
新英格兰植物俱乐部主席Jesse Bellemare欢迎参加2021年4月3日星期六举行的第1151次会议的与会者。他介绍了2021年NEBC杰出演讲者Robert I. Bertin博士，马萨诸塞州伍斯特圣十字学院生物学名誉教授。Bertin博士目前正在研究近期气候变化对开花物候的影响，以及新英格兰植物区系组成随时间的变化。他是伍斯特县植物区系的合著者，最近，他是富兰克林县植物区系的合著者，对我们地区植物区系变化的理解做出了重大贡献。伯丁博士的演讲题目是“区域植物区系和区域变化评估”。已出版的植物区系和植物标本馆收藏是植物分布历史数据的重要来源。新英格兰各机构保存的大多数植物标本馆标本都可以在东北植物标本馆联合会网站上以数字形式查看。NEBC植物标本室拥有最广泛的新英格兰标本收藏，可以追溯到200年前。MassWildlife的自然遗产和濒危物种计划(NHESP)是另一个有价值的资源，提供城镇稀有物种(国家列出)的发生情况。Bertin博士与Karen Searcy博士、Matt Hickler博士、Glenn Motzkin博士和Pete Grima博士一起参与了富兰克林县植物项目，并得到了其他植物学家的贡献。他们记录了4.6万份野外记录，收集了4300份标本，检查了1.6万份植物标本和数千份文献记录。由此产生的富兰克林县植物区系包括1205种本地物种和635种非本地物种，67种历史上未发现的物种和50种历史上未报告的记录物种。在康涅狄格河谷的城镇中发现了最高的多样性。Bertin博士简要介绍了他目前参与的三个合作植物区系项目:1)分析富兰克林县植物区系的变化;2)分析马萨诸塞州与北方有亲缘关系的稀有物种的变化;3)兰花丰度的变化。伯廷博士及其合作者使用一种指数来研究富兰克林县物种的变化，该指数基于最近(2010年以来)和历史(2010年之前)记录过物种的城镇数量。本地物种的中位数变化指数为正(0.18)，可能反映了最近采样的强度大于历史采样，而非本地物种的中位数变化指数为高(0.52)，反映了其频率的增加。非本地分类群的增加可能会给昆虫食草动物带来问题——比如飞蛾和蝴蝶——因为其他研究表明，这些昆虫在非本地植物上的多样性和丰度都较低。伯廷博士和合作者研究了不同栖息地类型的本地物种的变化。水生栖息地物种的大量明显增加可能是对这些物种进行更彻底采样的产物
{"title":"NEBC Meeting News","authors":"Karen Hirschberg","doi":"10.3119/0035-4902-123.994.233","DOIUrl":"https://doi.org/10.3119/0035-4902-123.994.233","url":null,"abstract":"New England Botanical Club President Jesse Bellemare welcomed participants to the 1151st meeting on Saturday, April 3, 2021. He introduced the 2021 NEBC Distinguished Speaker, Dr. Robert I. Bertin, Professor of Biology, Emeritus, College of the Holy Cross, Worcester, Massachusetts. Dr. Bertin is currently studying the effects of recent climate change on flowering phenology and changes in the floristic composition of New England over time. He coauthored the Flora of Worcester County and more recently, the Flora of Franklin County, and has made major contributions to the understanding of floristic change in our region. Dr. Bertin’s presentation was titled “Regional Floras and the Assessment of Regional Change.” Published floras and herbarium collections are vital sources of historic data on plant distributions. Most herbarium specimens held at New England institutions can be viewed in digital form on the Consortium of Northeastern Herbaria website. The NEBC Herbarium has the most extensive collection of New England specimens, going back 200 years. MassWildlife’s Natural Heritage and Endangered Species Program (NHESP) is another valuable source, providing town occurrences of rare (state-listed) species. Dr. Bertin worked on the Franklin County Flora Project with Dr. Karen Searcy, Matt Hickler, Glenn Motzkin, and Pete Grima, with contributions from other botanists. They logged 46,000 field records, collected 4300 specimens, and examined 16,000 herbarium specimens and thousands of literature records. The resulting Flora of Franklin County includes 1205 native species and 635 nonnative species, with 67 historic species not found and 50 species documented that had not been reported historically. The highest diversity was found in the towns of the Connecticut River Valley. Dr. Bertin briefly described three collaborative floristic projects in which he is currently involved: 1) analysis of changes in the flora of Franklin County, 2) analysis of changes in rare species in Massachusetts that have northern affinities, and 3) changes in abundance of orchids. Dr. Bertin and collaborators examined changes in Franklin County species using an index based on the number of towns in which a species was recorded recently (since 2010) and historically (pre-2010). The median change index was modestly positive (0.18) for native species, presumably reflecting the greater intensity of recent than historical sampling, but much higher (0.52) for nonnative species, reflecting their increasing frequency. This increase in nonnative taxa could cause problems for insect herbivores— such as moths and butterflies—since other studies have shown lower diversity and abundance of these insects on nonnative plants. Dr. Bertin and collaborators looked at changes in native species in different habitat types. A large apparent increase in species of aquatic habitats was probably an artifact of the more thorough sampling of these","PeriodicalId":54454,"journal":{"name":"Rhodora","volume":"123 1","pages":"233 - 236"},"PeriodicalIF":0.2,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48381521","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}
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