. The Canadian field-naturalist. 404 The Canadian Fiel'd-Naturalist Vol. 91. Figure 1. Canadian distribution of Listera auriculata, based on recently examined herbarium specimens and previous publication. 668 {"DAO). This is the northwestern limit of presently known distribution. Ontario: Kenora District, Big Trout Lake near Trout Lake Hudsons Bay Company post, 53°49' N, 89°53' W, 31 July 1956, /. Hustich 1630 (CAN). Quebec: New Quebec Territory, Poste-de-la-Baleine (Great Whale River), Baie d'Hudson, ca. 55°I7'N, 77°46'W, 4 August 1969, 5'. Brisson et P. Forest (LKHD, SFS); New Quebec Te
. The Canadian field-naturalist. 404 The Canadian Fiel'd-Naturalist Vol. 91. Figure 1. Canadian distribution of Listera auriculata, based on recently examined herbarium specimens and previous publication. 668 {"DAO). This is the northwestern limit of presently known distribution. Ontario: Kenora District, Big Trout Lake near Trout Lake Hudsons Bay Company post, 53°49' N, 89°53' W, 31 July 1956, /. Hustich 1630 (CAN). Quebec: New Quebec Territory, Poste-de-la-Baleine (Great Whale River), Baie d'Hudson, ca. 55°I7'N, 77°46'W, 4 August 1969, 5'. Brisson et P. Forest (LKHD, SFS); New Quebec Territory, Fort Chimo area, Highfall Creek, 58°0rN, 68°29'W, 2 August 1967, Y. Makinen 67-1584 (sub L. convallarioides CAN). This specimen represents the northern limit of known distribution. Newfoundland: Labrador West District, Hamilton River west of Lake Winikapau, 27 June 1967, /. Hustich 127 (CAN); Labrador North District, northeast side of Grand Lake, 9 July 1967, /. Hustich 299 (CAN); Labrador North District, Northwest River area, 9 July 1963, /. Hustich and P. Kallio 321 (CAN); Labrador North District, Goose Bay, Hamilton River, 53°19'N, 60°2rW, 13 August 1949, IV. B. Schofield [sub L. cordata, DAO). The Canadian distribution map (Figure 1) suggests that the greatest frequency of occurrence is close to the shores of Lake Superior, but it should be remembered that these shores have been more extensively botanized than have areas to the west, north, and east. In northern Ontario there are only three adequately documented stations that are far from Lake Superior. In southern Ontario the auricled twayblade was first discovered in 1968, and at present we know of seven widely separated locations (Figure 2). Two of these have already been described: Renfrew County near: Barry's Bay (MacKenzie and Greenwood 1969) and Nipissing District, Bronson Township (Brunton and Crins 1975). The other five stations are described below. 1. Haliburton County: Snowdon Township, 8 km nort
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