CATALOGUE OF CANADIAN PLANTS. 305 



(3076.) S. SINAPISTRUM, Crantz. 

 S. Pannonicum, Jseg. 



This species has been introduced in a number of places along the 

 line of the Canadian Pacific Railway. Castle Mountain, Eocky Moun- 

 tains, 1885. (Macoun.) Near Nepigon Bridge, Lake Superior, 1886. 

 (Fletcher.} At Port Arthur, Thunder Bay, Lake Superior, 1889. (Dr. 

 Britton.) On an embankment along the C. P. Ry., about 300 yards 

 west of Burketon station, 45 miles east of Toronto, 1889. (W. Scott.} 



61. DRABA. 



(173.) D. Fladnizensis, Wulf. ; Watson, Proced. Amer. Acad., 

 XV., 258. 



References under D. androsacea, Part I., 51, belong here. 



(176.) D. incana, Linn. var. arabisans, Watson; Gray, Man., 

 ed. VI., 67. (1890.) 



D. arabisans, Michx ; Macoun, Cat., I., 52 ; Gray, Man., ed. V., 71. (1867.) 



Draba incana is described in Gray's new manual as having oblong to 

 lanceolate pods which are generally acute and straight and often pube- 

 scent, while those of var. arabisans are glabrous, acuminate or acute and 

 twisted. 



54. LESQUERELLA, Watson, Proced. Amer. 

 Acad., XV., 249. 



(187.) L. Ludoviciana, Watson, Proced. Amer. Acad., XV., 252. 



Vesicaria Ludoviciana, DC. ; Macoun, Cat., L, 54, in part. 



All the prairie references in Part L, belong here. The specimens 

 from British Columbia to the next. 



Var. arenosa, Watson, Proced. Amer. Acad., XV., 252. 

 Vesicaria arenosa, Richards, in Frank. Journ., 26. 



Watson places this in the Saskatchewan region, but if V. arenosa is 

 a correct reference, then its habitat is "on a hill 700 feet high at Bear 

 Lake River," Lat. 65. This is the station mentioned by Richardson 

 in Hooker's Flora, Bor. Am., /., 48. 



