. La Canadian field-naturaliste. 1963 SOPER, DORE ET BoRAIAH : Rue-anemone 221. La figure 1. La distribution de Thalictrum thalictroides en Amérique du Nord. La ligne pointillée correspond approximativement à la limite nord de l'espèce : de telles plantes. Comme Allium canadense, Corylus americana, Jeffersonia diphylla, Lespedeza hirta L. intermedia, Podophyllum peltatum, Quercus, Rhus copallina muehlenbergii, Taenidia integerrijita et Vaccinium stamineum. Le premier soupçon que ThalictruTn thalictroides peuvent se produire dans l'Est de l'Ontario est venu d'un rapport en 1951 par George W. au nord d'Plamilton, étudiant à l'Université o

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. The Canadian field-naturalist. 1963 SOPER, DORE AND BoRAIAH: RuE-AnEMONE 221. Figure 1. Distribution of Thalictrum thalictroides in North America. The dotted line approximates the northern limit. species include such plants as Allium canadense, Corylus americana, Jeffersonia diphylla, Lespedeza hirta, L. intermedia, Podophyllum peltatum, Quercus muehlenbergii, Rhus copallina, Taenidia integerrijita and Vaccinium stamineum. The first suspicion that ThalictruTn thalictroides might occur in eastern Ontario came from a report in 1951 by George W. North of Plamilton, a student at the University of Toronto, who claimed to have seen the plant but was unable to supply definite information as to location. In 1961, one of the authors, while extending his floristic studies of the upper St. Lawrence valley (Dore, 1961) to Leeds County, encountered the plant anew and charted its occurrence in some detail. Around the hamlet of Mallorytown Landing rue- anemone was found growing in abundance at a number of sites all within an area about three miles long and half a mile wide on the granitic ridge which parallels the shore of the St. Lawrence at this point. It grew in dry, more-or- less open, woodland characterized by large trees of Pi?ius rigida, P. strobus, Quercus alba, Q. borealis var. maxima, Gary a ovata, C. cordiformis, Acer. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club

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