Sean Blaney
Mount Allison University, Botany, Department Member
Research Interests: Biology, Ecology, Canada, Railway, Ontario, and 4 moreHypericum, Range Extension, Perennial Plant, and Hypericaceae
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Abstract - We report a record of Dryopteris goldieana (Goldie's Fern; Dryopteridaceae) from the Bras d'Or Lakes watershed, new to the native flora of Nova Scotia. A small population of the species was discovered in 2020 in a... more
Abstract - We report a record of Dryopteris goldieana (Goldie's Fern; Dryopteridaceae) from the Bras d'Or Lakes watershed, new to the native flora of Nova Scotia. A small population of the species was discovered in 2020 in a Populus balsamifera (Balsam Poplar) floodplain forest of the Baddeck River, Victoria County, Cape Breton Island, NS, Canada.
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Abstract - We report a record of Dryopteris goldieana (Goldie's Fern; Dryopteridaceae) from the Bras d'Or Lakes watershed, new to the native flora of Nova Scotia. A small population of the species was discovered in 2020 in a... more
Abstract - We report a record of Dryopteris goldieana (Goldie's Fern; Dryopteridaceae) from the Bras d'Or Lakes watershed, new to the native flora of Nova Scotia. A small population of the species was discovered in 2020 in a Populus balsamifera (Balsam Poplar) floodplain forest of the Baddeck River, Victoria County, Cape Breton Island, NS, Canada.
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Hyssop-leaved Loosestrife {Lythrum hyssopifolia L.) is added to the Canadian flora on the basis of a 1992 collection from near Belleville, Hastings County, Ontario. This European adventive is otherwise known in the Great Lakes region only... more
Hyssop-leaved Loosestrife {Lythrum hyssopifolia L.) is added to the Canadian flora on the basis of a 1992 collection from near Belleville, Hastings County, Ontario. This European adventive is otherwise known in the Great Lakes region only from historical records from southeastern Michigan and central Ohio. Elsewhere in North America, it occurs primarily on the east and west coasts.
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This is the accepted manuscript of an article published by the Ottawa Field Naturalists Club.
ABSTRACT
We conducted a review of herbarium collections of the Wintercress genus (Barbarea W.T. Aiton) from the Maritime provinces. Most specimens previously determined to be the regionally rare native species Erect-fruit Wintercress (Barbarea... more
We conducted a review of herbarium collections of the Wintercress genus (Barbarea W.T. Aiton) from the Maritime provinces. Most specimens previously determined to be the regionally rare native species Erect-fruit Wintercress (Barbarea orthoceras Ledebour) are in fact the uncommon exotic Small-flowered Wintercress (Barbarea stricta Andrzejowski). The latter species is here reported as new to Atlantic Canada, where it is scattered but widespread in the three Maritime provinces. Only three collections (two from New Brunswick and one from Nova Scotia) were confirmed as B. orthoceras. Its known range extent and area of occupancy in the Maritimes has been significantly revised, and B. orthoceras is now considered potentially extirpated in New Brunswick and extremely rare in Nova Scotia. One collection from Nova Scotia was referred to another rare exotic species, Early Wintercress (Barbarea verna (Miller) Ascherson), which represents the first record for the Maritimes.
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Altai Fescue, Festuca altaica Trinius, is an amphi-Beringian grass species also known from isolated, but widespread, locations in northeastern North America. The occurrence reported here, at the southern limit of eastern alpine habitat in... more
Altai Fescue, Festuca altaica Trinius, is an amphi-Beringian grass species also known from isolated, but widespread, locations in northeastern North America. The occurrence reported here, at the southern limit of eastern alpine habitat in Canada, represents the first for Nova Scotia.
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Round-fruited St. John’s-wort (Hypericum sphaerocarpum), a native North American herbaceous, perennial vascular plant, is reported from four sites in southern Ontario, Canada. All four sites are along abandoned railway lines. Although the... more
Round-fruited St. John’s-wort (Hypericum sphaerocarpum), a native North American herbaceous, perennial vascular plant, is reported from four sites in southern Ontario, Canada. All four sites are along abandoned railway lines. Although the rich association of native flora suggests native status at one site, H. sphaerocarpum is believed to be introduced elsewhere in its Canadian range in Ontario.
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Bur Buttercup (Ranunculus testiculatus) is newly reported for eastern Canada based on two collections from campgrounds in southern Ontario. This vernal, annual, Eurasian weed is widespread in western North America and is expanding its... more
Bur Buttercup (Ranunculus testiculatus) is newly reported for eastern Canada based on two collections from campgrounds in southern Ontario. This vernal, annual, Eurasian weed is widespread in western North America and is expanding its range in the east; it should be expected elsewhere in eastern Canada. Bur Buttercup is known to be toxic to livestock.
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The Atlantic Maritime Ecozone has a long history of human occupation and human-assisted introduction of vascu-lar plants, by First Nations and especially by Europeans since the 1600s. This has increased the exotic proportion of the wild... more
The Atlantic Maritime Ecozone has a long history of human occupation and human-assisted introduction of vascu-lar plants, by First Nations and especially by Europeans since the 1600s. This has increased the exotic proportion of the wild vascular flora of New Brunswick, Nova Scotia, and Prince Edward Island (which make up the majority of the ecozone) to the current 38%, a value similar to other regions in eastern North America. We begin this chapter with an historical overview of the periods of natural isolation and invasion in the ecozone to demonstrate how its flora has always been invaded by plant populations that evolved in other areas. We then analyse the anthropogenic and natural communities of the ecozone that have the greatest prevalence of introduced species and discuss the introduced species composition particular to each. We contrast these communities most susceptible to exotic species with the ecozone's natural communities that are least occupied and ap-parently most ...
Hyssop-leaved Loosestrife {Lythrum hyssopifolia L.) is added to the Canadian flora on the basis of a 1992 collection from near Belleville, Hastings County, Ontario. This European adventive is otherwise known in the Great Lakes region only... more
Hyssop-leaved Loosestrife {Lythrum hyssopifolia L.) is added to the Canadian flora on the basis of a 1992 collection from near Belleville, Hastings County, Ontario. This European adventive is otherwise known in the Great Lakes region only from historical records from southeastern Michigan and central Ohio. Elsewhere in North America, it occurs primarily on the east and west coasts.
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Andropogon virginicus, Corex gracilescens, C. swanii, Corollorhiza odonlorhizo, Cyprus eryrhrorhizos, Cellis renuifolio and Leptolomo cognolum are added to the list of southern species, mostly of the eastern deciduous forest zone, that... more
Andropogon virginicus, Corex gracilescens, C. swanii, Corollorhiza odonlorhizo, Cyprus eryrhrorhizos, Cellis renuifolio and Leptolomo cognolum are added to the list of southern species, mostly of the eastern deciduous forest zone, that occur in the eastern Lake Ontario region. Asler acuminolus and Carex oppolochica are additions to the eastern flora of this interesting but poorly known region. The presence of southern and eastern elements is attributed to a combination of climatic factors and a migration route around the eastern end of Lake Ontario. Recent additions to the western prairie flora of this region include Corex bicknellii, Dichon1helium leibergii, D. villosissimurn var. praecocius, D. perlongum, Sporobolus asper, Ranunculus rhomboideus, and Vicia americono. The presence of western elements is attributed to a combination of dry, open habitats more or less connected with similar habitats to the west, and introduction by indigenous people. The eastern Lake Ontario region is...