-108 «E01.O(ilCAl. SUllVEV OK CANADA. 



(1871.) P. minimum, Wsitson. 

 Slopes of the South Kootunie Pass, 49th pai-jillel. (Daivson.) 



(187-.) P. maritimum, Linn. Coast Knotgrass. 



r. iirlciihin, \ar. litturale, Gray, Man. 374, 1856. 



Coast of Anticosti at Jiijiitor Eivor and at North Sydney, Capo Breton. 

 (^Macoun.) On Amherst and Grindstone Ishmds, Mag(h\len Tshmds, 

 Gulf of St. Lawronee. {McKay if- J. lUchanhon.) Sea-shoro at 

 Arisaig, N.S. {McKay.) Sandy sea-shoie at Halifax, N.S. (Sommers.) 

 Sandy sea-.shore at Bass River, Kent Co., N.B. {Fowler's Cat.) Sandy 

 shore, Bic, Eiver St. Lawrence, Q. (Pringle.) On sand along the 

 Penticate Kiver. Q. (St. Cyr.) 



(1873.) P. ramosissimum, Michx. 



Sandy shores oi- dessicated places, 2:)rincipally westward. Sandy 

 shores, Manitoulin Island and Parry Sound, Ont. {Burgess.) Mouth 

 of Mississaugi Kivei-, growing in crevices of rocks. {J. Bell.) Washow 

 Bay and other points on Lake Winnipeg. {J. M, Macoun.) Abundant 

 from Winnipeg to the Eocky Mountains, especially on the margins of 

 dried up pools. {Macoun.) South Fork of Old Man Eiver, Eocky 

 Mountains. {Dawson.) Sparingly in the Columbia Valley at Donald, 

 B.C. {Macoun.) 



(1874.) P, tenue, Michx. 



On sandy or rocky places from Ontario to the Pacific, Eocky bank 

 of St. Lawrence, two miles west of Brockville. {Billings.) Crevices 

 of rocks, Kingston Mills. {Maclagan.) Crevices of Lauren tian i-ocks 

 at Shannouville, Hastings Co. {Macoun.) Amongst rocks, Muskoka, 

 Ont. {Burgess.) Lake of the Woods, and in the Foot Hills of the 

 Eocky Mountains. {Dawson.) Crevices of rocks, Eat Portage ; also 

 occasionally in the praiiie region to the Eocky Mountains. {Macoun ) 

 Occurs rather frequently on the Souris Plain. {J. M. Macoun.) Sas- 

 katchewan region. {Bourgeau.) On gravel and sand, Thompson Eiver, 

 B.C. {Hill.) Lytton, Spence's Bridge and Kamloops, B.C. {Fletcher.) 



Var. latifollum, Engelm. 



Upper part of South Kootanie Pass, 49th parallel. 1883. {Dawson.) 



(1875.) P. coarctatum, Dougl. 



North Avard to British Columbia. ( Watson.) Prairi es at Nascpally Bay, 

 North-west coast. {Tolmie.) 



