. The Canadian field-naturalist. The Genus Listera (Twayblades) in New Brunswick William J. Cody and Derek Munro Biosystematics Research Institute, Agriculture Canada, Ottawa, Ontario Kl A 0C6 Cody, William J. and Derek Munro. 1980. The genus Listera (Twayblades) in New Brunswick. Canadian Field-Naturalist 94(4): 443-446. The occurrence and habitats of four species and one putative hybrid of the genus (Twayblades) in the province of New Brunswick are documented. Listera australis is reported as new to the province. Key Words: Listera, Twayblades, New Brunswick, geographical distributi
. The Canadian field-naturalist. The Genus Listera (Twayblades) in New Brunswick William J. Cody and Derek Munro Biosystematics Research Institute, Agriculture Canada, Ottawa, Ontario Kl A 0C6 Cody, William J. and Derek Munro. 1980. The genus Listera (Twayblades) in New Brunswick. Canadian Field-Naturalist 94(4): 443-446. The occurrence and habitats of four species and one putative hybrid of the genus (Twayblades) in the province of New Brunswick are documented. Listera australis is reported as new to the province. Key Words: Listera, Twayblades, New Brunswick, geographical distribution, new records, habitat, hybrids. The discovery of Listera australis. Southern Twayblade, new to the province of New Brunswick, while we were conducting a survey of the vascular plants of Kouchibouguac National Park, led us to examine other members of the genus. Four species, L. auriculata, L. australis, L. convallarioides, and L. cordata, and one hybrid, L. X veltntanii are now known to occur in the province. Of these, the putative hybrid is known from 2 sites, L. australis is known. from 1, L. auriculata from 9, L. convallarioides from 15, and L. cordata from 20. Species of Listera Listera auriculata, Auricled Twayblade (Figure lA) Known from Gloucester, Madawaska, Resti- gouche, Victoria, and York counties (Figure 1B). This is a northeastern North American species which is found in Canada from Newfoundland to Thunder Bay District, Ontario, and Manitoba (Singush Lake, 51°36'N, 100°48"W, Rowe 668 (DAO)), south in the United States to New England, New York, Michigan, Wisconsin, and Minnesota (Fernald 1950). A map of the Canadian distribution which does not show any collections from New Brunswick, is given by Whiting and Catling (1977). This species occurs mainly in the northern and western parts of the province where it is found on flood plains of streams, in alder {Alnus sp.) thickets, hardwood and softwood Please note that these images are extracted from scan
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