. The Canadian field-naturalist. 290 The Canadian Field-Naturalist Vol. 93 parts of Ontario and western Quebec (White 1977). Only recently noted in the province by the revision of a specimen collected in 1900 at Banff (Rigby and Britton 1970), it is now known from 11 sites in Alberta. These are all in or near the Bow Valley, a low dry valley in the eastern slopes of the Rocky Mountains. The additional stations are listed below. Herbarium acronyms follow Holmgren and Keuken (1974) with the exception of DFB which represents the author's personal Figure 2. Robust clump of Pellaea atro
. The Canadian field-naturalist. 290 The Canadian Field-Naturalist Vol. 93 parts of Ontario and western Quebec (White 1977). Only recently noted in the province by the revision of a specimen collected in 1900 at Banff (Rigby and Britton 1970), it is now known from 11 sites in Alberta. These are all in or near the Bow Valley, a low dry valley in the eastern slopes of the Rocky Mountains. The additional stations are listed below. Herbarium acronyms follow Holmgren and Keuken (1974) with the exception of DFB which represents the author's personal Figure 2. Robust clump of Pellaea atropupurea growing in wide fissure in southwest-facing limestone cliff-face. Gap Lake, Exshaw, Alberta, 18 February 1978. 4 mi [ km] E of Canmore, Porsild 18147 in 1951 (CAN), Brunton 1289 in 1976 (DFB,DAO, CAN); mi [ km] SE of Exshaw, Bird 18500 in 1967 (UAC), Brunton 1307 in 1977 (DFB): 4 mi [ km] SE of summit of Mount Head, Bird28833 in 1972 (UAC); km NE of Exshaw, Brunton and Brunton 1247 in 1976 (DFB,DAO,ALTA,CAN); 2 km NE of Exshaw, Brunton and Grant 1522 in 1977 (DFB,CAN); km W of Exshaw, Brunton 1530 in 1978 (DFB); km W of Exshaw at Gap Lake, Brunton 1528 in 1978 (DFB,DAO); 1 km NE of Exshaw, Brunton and Coneybeare 1532 in 1978 (DFB,CAN); km S of Kananaskis Environmental Sciences Center, Barrier Lake, Brunton 1538 in 1978 (DFB); 12 mi [ km]SofSeebe, Cody, Jaquesand Corbin 23037 in 1977 (DAO); southeast Barrier Lake, Kananaskis Valley, Brunton 1623 in 1979 (DAO). The species is exceptionally abundant at several sites, particularly the Grotto Mountain and Gap Lake sites {Porsild 18147 and Brunton 1289, and Brunton 1528 respectively). Alberta specimens are typically less than 20 cm tall. Only at the above sites (and at Barrier Lake, Cody et al. 23037) were plants noted which approached 30 cm in height, a condition more typical of eastern Canadian plants. This is likely a reflection of the much drier climate of Alberta. We observed that P. atro
Size: 1317px × 1897px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorottawafieldnaturalistsclub, bookcentury1900, bookcolle
