58 GEOLOGICAL SURVEY OF CANADA. 



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



Cochlearia humifusa, Michx. Fl. II., 27. 



Coronopus didymus, Pursh, 435. 



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



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

 ing from ballast at St. John, KB. (Foivlers Cat.) On the wharf at 

 Basin, Q. (J. Bell.) 



65. CAKILE, Tourn. (SEA ROCKET.) 



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



C. maritima, Pursh, 434. 



C. edentula, Hook. Fl. I., 59. 



C. maritima, var. Americana. 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 Kadish. 



Introduced from Europe. Annapolis, N.S. (McKay.) A trouble- 

 some weed at Frcdericton, 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. 



t 

 67. THELYPODIUM,Endl. (PURPLE ROCKET.) 



(214.) T. pinnatifldum, Watson. 



Hesperis (?) pinnatifida, Michx. Fl. II., 31. 

 Chieranthus hespmdoides, Torr. & Gray, Fl. I., 72. 

 Arabis hesperidcrides, Gray, Manual, 68. 



Found at Montebello, on the Lower Ottawa, around springs, June, 

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

 have been introduced. 



