. The Canadian field-naturalist. 1979 RiLEY: New Northern Ontario Plants 357 1978 (TRT)) and from willow thickets near North Point, James Bay (51°28'N, 80°27'W; Tessier, 15 July 1976 (TRT), det. Ball) confirm Porsild's (1957) observation that the species' habit is "more lax in wetter sites" (Figure 2). Hierochloe alpina {Riley 9458) was collected only on the summit of the outcrop at Aquatuk Lake (CAN, TRT) (Figure 3). Specimens collected belong to the subspecies orihantha, having untwisted awns attached above the middle of the second glume (Weimarck 1971). This taxon occurs from Gree
. The Canadian field-naturalist. 1979 RiLEY: New Northern Ontario Plants 357 1978 (TRT)) and from willow thickets near North Point, James Bay (51°28'N, 80°27'W; Tessier, 15 July 1976 (TRT), det. Ball) confirm Porsild's (1957) observation that the species' habit is "more lax in wetter sites" (Figure 2). Hierochloe alpina {Riley 9458) was collected only on the summit of the outcrop at Aquatuk Lake (CAN, TRT) (Figure 3). Specimens collected belong to the subspecies orihantha, having untwisted awns attached above the middle of the second glume (Weimarck 1971). This taxon occurs from Greenland to the east coast of Hudson Bay and James Bay south to several mountain areas of New England and upper New York State. It reoccurs sporadically in Beringia, but this collection represents the western limit of its major range; the closest westward location, at Cape Churchill, is of ssp. alpina. This collection represents the first Ontario record of this circumpolar arctic- alpine species. John Macoun's reference (1888) to its occurrence at Moose Factory, James Bay, is un- substantiated and highly improbable (Dutilly et al. 1954) (Figure 3). Luzula confusa {Riley 9512, 9467) is a circum- polar arctic species, occurring southward in the Canadian Rockies and on a few mountain tops in New England, in dry turfy tundra heath, and on rocky slopes and ledges (Porsild 1957; Hulten 1968). These first Ontario records (TRT) complete the distribu- tional gap between occurrences at Churchill, Mani- toba and the northeastern shore of James Bay, Quebec (Figure 2). Minuartia groenlandica {Arenaria g.) (Riley 9526, 9471), the attractive Greenland sandwort, is an. • Hierochloe alpina -- Agropyron violaceum ^? Calamagrostis deschampsioides #• Aster alpinus ^--52; Figure 3. Ontario distribution of Hierochloe alpina, Agropyron violaceum, Calamagrostis deschamp- sioides. and Aster alpinus. eastern North American subarctic endemic, occurring from Greenland, southwestward through Newfound- l
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