. The Canadian field-naturalist. Figure 1. Upper portion of a flowering plant of Pycnanthemum incanum, Hoary Mountain Mint, at Burlington, Ontario, 11 August 1984. Municipality of Halton at the western end of Lake Ontario, is known (Figure 3). Between the years 1895 and 1900, P. incanum was collected in the Brown's Wharf-Bay View area of Hamilton (now in Burlington), Ontario. It was not seen again until 1981, when the author rediscovered it in the same general area in Burlington. Habitat The only Canadian station of P. incanum is located on a mildly sloping portion of the glacial Lake Iroquois
. The Canadian field-naturalist. Figure 1. Upper portion of a flowering plant of Pycnanthemum incanum, Hoary Mountain Mint, at Burlington, Ontario, 11 August 1984. Municipality of Halton at the western end of Lake Ontario, is known (Figure 3). Between the years 1895 and 1900, P. incanum was collected in the Brown's Wharf-Bay View area of Hamilton (now in Burlington), Ontario. It was not seen again until 1981, when the author rediscovered it in the same general area in Burlington. Habitat The only Canadian station of P. incanum is located on a mildly sloping portion of the glacial Lake Iroquois shoreline, near the rim of the steep slope of the present Burlington Bay bluffs. It occurs in the partial shade of oaks (Quercus spp.), and in an open, dry area on the slope. Staghorn Sumac (Rhus typhina L.) and White Pine (Pinus strobus L.) seedlings comprise the only other native woody species at the site. A sample of the surface soil at this site yielded the following data: pH — ; phosphorus — 6 ppm (parts per million of soil); potassium --35 ppm; magnesium - 98 ppm; calcium 2129 ppm; texture — coarse. Several of its associates are members of a relict shoreline flora with southern and western affinities [, Andropogon scoparius Michx. (Little Bluestem), Asclepias tuberosa L. (Butterfly-weed), Carex foenea Willd., Lespedeza capitata Michx. (Round-headed Bush-clover)]. This assemblage of species probably developed during the existence of Lake Iroquois, when direct contact with the Appalachian, Coastal Plain, and midwestern floras may have been facilitated. The open or partially shaded habitat is characteristic of the species throughout its range. General Biology Pycnanthemum incanum flowers between mid- July and mid-September in New England (Seymour 1969). This range of dates is corrobo- rated by specimens from throughout the range of the species, including those from Burlington. The evidence of reproduction in the Burlington population is scant. A few young veget
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Keywords: ., bookauthorottawafi, bookcentury1900, bookdecade1910, bookyear1919
