178 GEOLOGICAL SURVEY OF CANADA. 



{Fletcher, Fl. Ott.) Huckleberry Rapids, Avgenteuil Co., Q. (D' Urban.) 

 Grand Trunk gravel pit, near Preseott, Ont. {Billings.) Very abun. 

 dant on Laurentian rocks, at Shannonville, and on the bank of the 

 Trent, above the railway bridge, near Trenton, Hastings Co., Ont. ; dry 

 places at Owen Sound ; uj) the Kaministiqua, near Kakabeka Falls, 

 and on Pie Island, Lake Superior. {Macoun.) Vicinity of London, 

 Ont. {Burgess. Millman.) Dry banks, Hamilton, Ont. {Logic.) Plains 

 of the Saskatchewan. {Hooker, Fl.) 



(2697.) P. dichotomum, Linn.; Pursh, Fl. I., 67. 



Eathcr common in dry or damp thickets and meadows. The typical 

 form is the P. nodijiorum. Lam., and is chieily found in meadows and 

 on rocks. Newfoundland. {Seeks.) Common at Bedford, X.S. (MaC'Un.) 

 Glenelg, Guysboro Co., X.S. {Faribault.) In dry fields and woods, Kent 

 Co., N.B. {Fcider, Cat.) Quebec. {St. Cijr.) Banks of the Eividre 

 Eousre, Argenteuil Co., Q. {D' Urban.) Tadousac, Q. {A. T. Drum- 

 mmid.) Vicinity of Ottawa ; common. {Fletcher, Fl. Ott.) Thickets 

 near Prescott, Ont. {Billings.) Abundant on dry sandy soil through- 

 out Ontario, extending westwai'd to Owen Sound, and north-west to 

 Sault Ste. Marie, and around Lake Sujierior to Thunder Bay. {Macoun.) 

 Port Colborne, Ont. {McGill Coll. Herb.) Vicinity of Hamilton, Ont. 

 {Logic.) London, Windsor, and Point Pelee, Lake Erie. {Burgess.) 

 Eupert Eiver, X.E.T. ; Medicine ILit, Alberta. {J. M. Macoun.) 



Var. nitidum, Lam.; Gray, Man. Ed. V., 649. 



P. nitidum, Lam. ; Michx., Fl. I,, 47; Pursh, Fl. I., 67.; Hook., Fl. II., 235. 



This is the smooth unbranehed form most frequently met with in 

 thickets. St. James, N.B. {Vroom.) Sandy woods, near Belleville, 

 and Owen Sound, Ont. {Macoun.) Throughout Canada to the Sas- 

 katchewan. {Hooker, Fl.) 



Var. pubescens, Giay, Man. Ed. V., 649. 



P. P'lUsceus. Lam,; Michx,, Fl. L, 47; Pursh, Fl. I., 68, 

 P. tlurinak, Boland. Proced. Calif. Acad. IL, 181. 



Leaves and sheaths pubescent. Sandy woods. Point Pel^e, Lake 

 Erie. {Burgess.) Valley of the L'pper Columbia, B.C. {Dawson.) 

 On the higher slopes of Mount Dawson, Koger's Pass, B,C, {Macoun.) 



(2G98.) P. GLABRtJM, Gaud.Agrost, ],, 22, 



JDigitaria glabra, RcEm. & Schultz. ; Torr, Fl. I,, 154. 

 D. Ischamum, Schreb. ; Muhl. Gram. 121. 



Introduced chiefly along railways and waste ground about towns. 

 Truro, and Pictou, IST.S. {Macoun.) Fredericton, on the railway track; 



