CATALOGUE OF CANADIAN PLANTS 161 



(Y46.) R. divaricatum, Dougl. 



a. triflorum, Hook. & Am. Bot. Beeohey's Voy. 

 R. villomm, Nutt. Torr. & Gray, Fl. I., 547. 



A common bush on the banks of streams, near Indian villages, on 

 the north-west coast, Lat. 49''-52° (Douglas.) Thickets, Vancouver 

 Island, near Victoria ; also in the valley of the Lower Fraser. (Macoun.) 



Var. irriguum, Gray. 



E. irriguum, Dougl. Hook. M. I., 231. 



Moist mountain rocks on the upper part of the Columbia Eiver. 

 (Douglas.') In woods along the British Columbia boundary, Lat. 49°. 

 (Watson.) In the Cascade Mountains, above Yale, B.C. ? (Macoun.) 



(747.) R. oxyacanthoides, Linn. 



B. hirtellum, Michx. Hook. Fl. I., 231. Macoun's Cat., No. 605. 

 R. saxosum, Hook. Fl. I., 231. 



A very common species, being found from Newfoundland and Nova 

 Scotia to the Pacific. It prefers swamps in Ontario, but lake and river 

 margins in the interior. I suspect that Gray unites two species under 

 this name, as the form found in the prairie region is very unlike the 

 eastern one. 



(748.) R. rotund ifolium, Michx. 



R. triflorum, Willd. Hook. Fl. I., 230. 

 R. gracile, Pursh, 105. 



Pictou, N. S. (McKay.) ' Eiver Avon, Windsor, K S. (How.) 

 Halifax, N. S. (Lawson.) Cape Eouge Eiver. Q. (Bninet.) Not 

 very common at Eiviere du Loup. (Thomas.) Nonpareil, Q. (Mac- 

 lagan.) Common at Prescott, Ont. [?] (Billings.) Vicinity of Ham- 

 ilton, Ont. [?] (Buchan.) Several of the above references may apply 

 to B. oxyacanthoides, the two references to Ontario being particularly 

 doubtful. 



(749.) R. Cynosbati, Linn. 



E. oxyacanthoides, var. y., Torr. & Gray, Fl. I., 546. 

 R. oxyacanthoides, PI. Bourgeau, 256. 



Black Eiver, St. John, N.B. (Bev J. P. Sheraton.) Very common 

 from Eiviere du Loup, Q., to the Sault Ste. Marie, Ont. (Macoun.) 

 Pembina Mountain, Man. (Dawson.) 



(750.) R. lacustre, Poir. 



R. oxyacanthoides, Miehx. Fl. I., 111. 



Throughout Canada to Port Franklin and Bear Lake, near the Arctic 



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