The Canadian Field-Naturalist Vol
New Vascular Plant Records on Pelee and East Sister Islands, Essex County, Ontario Craig A. Campbell' and A. A. Reznicek^ 1421 King Street North. Waterloo, Ontario N2J 3Z4 ^Department of Botany, Erindale College, University of Toronto, Mississauga, Ontario L5L 1C6 Campbell, C. A. and A. A. Reznicek. 1977. New vascular plant records on Pelee and East Sister Islands, Essex County, Ontario. Canadian Field-Naturalist 92(1): 384-390. Pelee Island, the southernmost part of Canada, has a diverse and very interesting flora containing many species rare or absent elsewhere in Canada. Reported as new to Canada are seven species of vascular plants: Carex davisii, Care.x divulsa subsp. leersii, Sedum telephioides. Euphorbia obiusala, Myosotis macrosperma, Lycopus virginicus var. virginicus, and Senecio glabellus. These are briefly discussed. In addition, we report on the status of 13 very rare species known previously from the area: Camassia scilloides, Spiranthes magnicamporum, Celtis tenuifolia, Chenopodium foggii, Thalictrum dasycarpum. Corydalis flavula. Cydonia oblonga, Ammannia coccinea, Chaerophyllum procumbens, Phacelia purshii, Conobea multifida, Eupatorium ahissimum, and Eclipta prostrata. Fifty-five other species that are additions to the published flora of the Erie Archipelago, Pelee Island, and East Sister Island are listed as well. Key Words: vascular plants, floristics, Erie Archipelago, Ontario, Canada, endangered species, phytogeography. Field work on Pelee Island, Essex County, The warm chmate of Pelee Island is largely a Ontario, during the past 1 years has resulted in a result of the moderating effects of Lake Erie; the number of discoveries of considerable floristic mean annual temperature is 9.6° C (49.3° F), interest. Several species not previously reported several degrees higher than that of the mainland for Ontario or even for Canada have been of Essex-Kent Counties.
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