THE OTTAWA NATURALIST"^* 



VOL. XXIIl. OTTAWA, OCTOBER, 1909 No. 7 



NOTES FROM THE HERBARIUM OF THE GEOLOGICAL 



SURVEY OF CANADA. 



By James M. Macoun. 



Arabis Whitedii, Piper, Bull. Torr. Bot. Club, xxviii: 39. 



Near Sidle3^ west of Midway, B.C., 1905. Herb. No. 70,820. 

 (W. Spreadhorough). New to Canada. Only flowering specimens 

 were collected and these in general appearance resemble 

 Lesquerella rather than Arahis. Determined by Dr. Greene. 



Lepidium campestre, (L.) R. Br. 



Becoming common in Eastern Canada, especially in Ontario. 

 Collected at Lower Montague, Prince Edward Island, by Mr. 

 Geo. A. Amear. 



Spir^a pyramidata, Greene, Pittonia II: 221. 



S. DoMglasii, var. Nobleana, Can. Rec. Sci., 1895, p. 3. 



The plant which was referred above by the writer to 

 S. ponglasii, var. Nobleana, proves to be S. pyramidyfa. It was 

 collected at Sicamous, B.C., by Prof. Macoun. A single bush 

 over five feet high of what is doubtfully referred here was found 

 growing along the trail near Lake House, Skagit River, B.C., by 

 J. M. Macoun, June 27, 1905, No. 69,957. The flowers were too 

 immature for definite determination, but unless a hybrid between 

 5. lucida and 5. Menziesii, both of which grew near, it is probably 

 this species. Spreadhorough in 1906 found a bush in flower at 

 4,500 ft. ah. near Chilliwack Lake, B.C., No. 72,872, and again 

 with 5. lucida and 5. Menziesii which makes it more probable 

 that this white-flowered bush is a hybrid. 



Spir^a densiflora, Nutt.; Torr. & Gray. Fl. I: 414. 



S. betul-i'folia var. rosea, Gray. 



5. arbuscula, Greene. 



Recorded from the Selkirk Mts., B.C., by manv collectors. 

 Not rare in the Chilliwack Valley, B.C., between 4,000 and 6,000 



