CA-^AtOnUE OP CANADIAN PtANtS. 353 



(1878.) p. lapathifolium, Linn.; Gray, Man., ed. VI., 440. 



P. nodomm, Pers. & P. incamatum, Macoun, Cat. III., 409, in part. 



Spikes oblong to linear (i-2 in. long), dense, erect, or nearly so. 

 Our herbarium specimens are from Brackley Point, Prince Edward 

 Island; Norton, N.B. ; Lake Nepigon, Ont. ; Qu'Appelle, and Devil's 

 Lake, Assiniboia; Kicking Horse Lake, Rocky Mountains; Indian 

 Reservation, Kamloops, B.C. ; and Cowichan River, Vancouver Island. 

 (Macmn.) 



Var. incarnatum, Watson, Gray, Man., ed. VT., 440. 

 P. incarnatum, Macoun, Cat., IIT., 409. 



Spikes more sleridor and eloiii^ated (2-4 in. long), nodding. Our 

 herbarium s])Ciinions arc from Hull near Ottawa; Belleville, Hastings 

 Co., Ont.; Kew Gardens, To ion to ; Saskatchewan River; and Port 

 Moodj', B.C. (Mwoun.) 



Var. incanum, Ko<h.; Macoun, (!at.. III., 410. 



Leaves small, obtusish, more or less hoary beneath, with floccose 

 tomenlum ; spikes .short. Our specimens ai-e from Seymour, Nor- 

 thumberland Co., Ont. ; Gull Island, Lake Nepigon ; Muskeg Island, 

 Lake Winnipeg ; Medicine Hat, Assiniboia. {Macoun.) 



(1880.) P. Muhlenbergii, Watson; Gray, Man., ed. VI., 441. 

 P. MultUnlnri/ii, Macoun, Cat., III., 410, in part. 

 Decumbent or sub-erect, scabrous with short appressed hairs. Wet 

 places, London, Ont. (Burgess.) On the Indian Reservation, Kam- 

 loops, B.C. 18S0. (Macoun.) The latter specimens are without flowers 

 and much more hairy than those from Loudon. 



(Sl'rg.) P. emersum, Muhl.? 



Differs from P. Muhlenbergii, in having the leaves much rougher 

 with appressed hairs; lower sheaths and petioles quite smooth and 

 the upper part of the stem and flower spike covered with glandular 

 hairs. Under side of petiole and midrib of leaf quite hairy. Our speci- 

 mens aie from Short Creek and Moose Jaw and Thunder creeks ; also 

 Tail Creek and Belly River. This is the common Polygonum along all 

 the streams throughout the prairie region. 



