58 GEOLOGICAL SURVEY OF CANADA. 



(210.) S. didyma, Pers. Wart-cress. • 



CocMearia humifuaa, Michx. Fl. II., 27. 



Coronopvia didymus, Purgli, 435. 



Senelnera pinnatifida, DC. Torr. & Gray, Fl. I., 114. 



Introduced in ballast. Newfoundland. (McGrill Coll. Herb.) Spread- 

 ing from ballast at St. John, N.B. (Fowler's Gat.) On the wharf at 

 Gasp^ Basin, Q. (J. Bell.) 



65. CAKILE, Tourn. (SEA ROCKET.) 



(211.) C. Americana, Nutt. American Sea Eocket. 



C. maritima, Pursh, 434. 



C. edentvla, Hook. FI. I., 59. 



C. maritima, var. Americancu Torr. & Gray, Fl. I., 119. 



Common along the shores of the Maritime Provinces, on the shores 

 of the Gulf of St. Lawrence and on many beaches along the river. 

 Along the shores of the great lakes at intervals from Kingston to 

 Thunder Bay. 



66. RAPHANUS, Linn. (RADISH.) 



(212.) R. Raphanistrum, Linn. Wild Eadish. 



Introduced from Europe. Annapolis, JST.S. {McKay.) A trouble- 

 some weed at Fredericton, N.B., and a few other places. (Fowler's 

 Cat.) Barrie, Lake Simcoe, Ont. (Buchan.) 



(213.) R. sativus, Linn. Garden Eadish. 



Spontaneous on waste heaps and frequent around market gardens. 

 Seldom remains more than two years. 



67. THELYPODIUM,Endi. (PURPLE ROCKET.) 



(214.) T. pinnatifidum, Watson. 



Segperis (?) pinnatifida, Michx. FI. II., 81. 

 Chieranthvs he«peridoides, Torr.'*& Gray, Fl. I., 72. 

 Arabia hesperidoideg, Gray, Manual, 68. 



Pound at Montebello, on the Lower Ottawa, ai-ound springs, June 

 1881. (R. B. Whyte.) This species is far out of its range and may 

 have been introduced. 



