Oct.-Dec. 1921.] 



Thk Canadian Field-Natiralist 



125 



Labiatae 



Mentha arvensis L. var. cana- 



[densis Bri. ... nc 



Compositae Achillea millefolium L no 



Artemisia caudata Michx nc nc nc 



Solidago canadensis L nc ec c 



" sp nc c nc 



nc 



nc nc 



ec extremely common, 

 mon. r rare. 



vc verv common. 



common. 



nc not com- 



of the zone. It will be obvious, of course, 

 that the term "ver^- common" has quite a 

 different value in numbers of plants to a 

 unit area when applied to say roses and 

 grass. 



The plants were kindly identified for me 

 by Mr. C. W. Lowe of Winnipeg, 



The foregoing list is typical of the flora 

 of sandy areas in the region of Lake Win- 

 nipeg with perhaps the possible exception 

 of Astralagus aboriginorum. This does not 

 ap])ear to be common in the province and 

 is listed by Rydberg (6) as a mountainous 

 or sub-mountainous species and is not 

 stated to occur in the province by Gray 



While it is true tliat on the whole the 

 zonation is striking in its regularity, there 

 are two notewortliy exceptions. Firstly, 

 at the east end in the neighborhood of the 

 camp which has been used both in sum- 

 mer and winter for some years, the zones 

 are mixed. There are one or two old camp 



sites and frequently dog teams are tether- 

 ed at this point. Apart from this, how- 

 ever, there is a large clump of willows ex- 

 tending across several zones and these give 

 shelter to plants — Anemone canadensis, 

 Achillea millefolium, Rub us idaeus var. 

 strigosus and Fragaria vesca — not at all 

 common elsewhere. 



Secondly, at the end where the spit joins 

 the main ridge there is a transverse ridge 

 of limestone pebbles which are overgro\vn 

 with lichens, including Cladonia pyxidata, 

 and are obviously older than the remain- 

 ing part of the ridge. Among the peb- 

 bles, remains of a few Ammonites (*) were 

 found but they were too worn and broken 

 to be identified. This partly juts into the 

 daughter spit, noticeably at zone H, and 

 partly also at G and K, and the west end 

 of these zones include part of the zonation 

 of the main ridge. Tlie plants here, Popu- 



* These appear to be Maclurea and perhaps 

 M. Manitobaensis. 



