. The Canadian field-naturalist. 210 The Canadian Field-Naturalist Vol. 98. Figure 1. Southern Ontario distributions of Carex atlantica subsp. capillacea, Carex emmonsii, Carex suberecta and Carex svlvatica. with an excurrent midvein. In C. artitecta, the stami- nate scales are obtuse to acuminate, but smooth and more or less flat at the tip without an excurrent mid- vein (Figure 2). In addition the bract of the lowest pistillate spike frequently exceeds the inflorescence in C. emmonsii but rarely does so in C. artitecta (Figure 2). Carex artitecta is a local plant of forests in south- western
. The Canadian field-naturalist. 210 The Canadian Field-Naturalist Vol. 98. Figure 1. Southern Ontario distributions of Carex atlantica subsp. capillacea, Carex emmonsii, Carex suberecta and Carex svlvatica. with an excurrent midvein. In C. artitecta, the stami- nate scales are obtuse to acuminate, but smooth and more or less flat at the tip without an excurrent mid- vein (Figure 2). In addition the bract of the lowest pistillate spike frequently exceeds the inflorescence in C. emmonsii but rarely does so in C. artitecta (Figure 2). Carex artitecta is a local plant of forests in south- western Ontario, re-appearing at the head of the St. Lawrence River in St. Lawrence Islands National Park (Ball et al. 1982). In the Wainfleet Bog, C. emmonsii occurs locally in the open on dryish, acid peat in more or less disturbed sites within the area of active peat extraction. Associated species included Aralia hispida Vent., Rubus spp., Carex scoparia Willd., C. cumulata (^aWcy) Mack, and Linariacana- densis (L.). Dum. The station is mapped in Figure 1. Carex emmonsii Dewey, C. seorsa Howe and Fuir- enapumila Torrey, also discussed herein, represent an interesting group of eastern species that occur very locally in the eastern Lake Erie region. Additional species of similar distribution already known from the area include Carex alata Torrey (Reznicek and Catling 1982), Myrica pensylvanica Loisel. and Polygonum careyi Olney, among others. All of these species are plants of open ground, usually occurring most commonly near the Atlantic Coast. Stations inland are often few and scattered. Specimens examined: ONTARIO, Regional Municipality of Niagara [Welland County], Wainfleet Peat Bog, ca. 5 km NW of Port Colborne in Wainfleet Tp., approximately 42°55'N, 79°19'W, 14 June \9U,A. A. Reznicek & P. M. Catling3413, (DAO, MICH, and duplicates to be distributed). Carex seorsa E. C. Howe This sedge is largely confined in North America to the Atlantic coastal plain (Reznicek and Ball
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