CATALOIiUE OF CANADIAN PLANTS. 81 



XVI. PAEONYCHIIliE. 



87. PARONYCHIA, Tourn. (WHITLOW-WORT.) 



(323.) P. sessiliflora, Nutt. Hook. Fl. I., 226. 



Dry banks of the noi-th Saskatchewan ; between Carlton and Bdmon- 

 ston. (Drummond.) On dry hills and river banks throughout the 

 southern prairie. (Macoun.) 



88. ANYCHIA, Michx. (FORKED CHIOKWEED.) 



(324.) A. dichotoma, Michx. Fl. I., 113. 

 A. Canadensis, Elliott. Hook. Fl. I., 226. 



This plant is introduced into the catalogue on the authority of Hooker, 

 who is followed by Torrey & Gray. "We have no direct proof of its 

 occurrence within our limits. . 



89. SCLERANTHUS, Linn. (KNAWEL.) 



(325.) S. annuus, Linn. Pursh, 315. 



Introduced at a few points. Three Eivers, Q. (Madagan.) Port 

 Colborne, Lake Brie. (McGill Coll. Herb.) 



XVII. POETULACACEtB. Purslane Family. 



90. PORTULACA, Tourn. (PURSLANE.) 



(326.) P. oleracea, Linn. Common Purslane. 



Introduced and become a pestilent weed in all market gardens. 

 Owing to its tenacity of life and the power of ripening its seeds long 

 after it has been rooted up, it is very difficult to get rid of It is found 

 in waste places and in gardens wherever cultivation has been attempted. 



91. LEWISIA, Pursh> 



(327.) L. rediviva, Pursh. 



Abundant on the dry, arid soil around Ashcrofb, Thompson Eiver, B.C. 



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