. The Canadian field-naturalist. 186 The Canadian Field-Naturalist Vol. 96. Figure 2. Habitat ofCarex nigromarginata on Long Point. Open Red Oak(Quercus rubrum) and Red Maple (A cer rubrum) woodland on knoll surrounded by marsh at the north end of Squires Ridge. Photographed 25 May 1980. nea var. alata) but his reports are far beyond its pres- ently known range. Carex alata is primarily a southern and eastern species but ranges north to Mas- sachusetts (Mackenzie 1931) and inland in glaciated territory in northwestern Pennsylvania (Bright 1930; Jennings 1953), northern Ohio (Braun 1967), north
. The Canadian field-naturalist. 186 The Canadian Field-Naturalist Vol. 96. Figure 2. Habitat ofCarex nigromarginata on Long Point. Open Red Oak(Quercus rubrum) and Red Maple (A cer rubrum) woodland on knoll surrounded by marsh at the north end of Squires Ridge. Photographed 25 May 1980. nea var. alata) but his reports are far beyond its pres- ently known range. Carex alata is primarily a southern and eastern species but ranges north to Mas- sachusetts (Mackenzie 1931) and inland in glaciated territory in northwestern Pennsylvania (Bright 1930; Jennings 1953), northern Ohio (Braun 1967), north- western Indiana (Deam 1940) and north well into Michigan (Voss 1972). Vouchers for Macoun's Cana- dian reports have not been found and identifications were probably revised and the specimens re-filed. A report from Lambton County (Dodge 1914; repeated by Soper (1949) and Scoggan (1978)) represents a more likely occurrence. However, a search of MICH, MSC, TRT, CAN, NY and DAO disclosed no Dodge voucher, as has been the case with many interesting Dodge records for southwestern Ontario. This species is not reported for Canada by Boivin (1967). Carex alata is one of the more distinctive members of the notoriously difficult section Ovales. Apart from C. hormathodes, a coastal marsh species occurring in the maritime provinces, C. alata is the only Canadian member of the Ovales with awn-tipped pistillate scales. The combination of this feature with a rela- tively short perigynium beak, more or less dense, stiff and erect infructescence, and perigynium body widest above the middle separate this from all other similar species (Figure 4). Acknowledgments We would like to thank Howard Crum and David Lane for determining our bryophyte collections, and G. B. McKeating and the Canadian Wildlife Service for their extensive and kind help with our field work. Crins and P. W. Ball kindly examined our spec- imens of Carex section Montanae. C. S. Keener pro- vided us with helpful informatio
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