82 



still apparent. On the north shore of Douglas Lake, three long- 

 established summer-resort colonies, separated by half-mile 

 intervals, showed in 1914 a reduction in number of species from 

 42 to 26 and I. These proportions are still maintained, although 

 with some changes, in the species represented. On the same 

 shore of the lake, half a mile farther from permanent residences, 

 a cottage was built in 1916. Although the forest has been 

 cleared around it, affording better conditions for ecesis, its intro- 

 duced flora is still limited to the single species Poa compressa. 



The same feature is again illustrated around Bryant's resort 

 on the south shore of the lake. At the small hotel, where all 

 wagon traffic ends, 19 species occurred in 1914 and 29 in 1917, 

 Of the older flora. Polygonum persicaria, Chenopodium hybridum, 

 Amaranthus retroflexus, and Anthemis cotula have disappeared, 

 and 14 new species have appeared. These diVe Ambrosia artemisii- 

 folia, Brassica alba, Capsella bursa-pastoris, Cerastium vulgatum, 

 Chrysanthemum Leucanthemum, Galeopsis Tetrahit, Lychnis alba, 

 Polygonum erectum, Rumex obtusif alius , Sedum acre, Sisymbrium 

 altissimum Trifolium repens, Verbascum Thapsus, and Veronica 

 arvensis. Of these new arrivals, Capsella, Cerastium, Verbascum, 

 and Trifolium occurred in 19 14 around cottages near the hotel and 

 only a minor extension of range has been required. At the same 

 time Chrysanthemum and Sisymbrium occurred along the main 

 road leading to the hotel and less than a mile away. There still 

 remain eight species which did not occur in the vicinity in 1914, 

 and which have since effected a considerable migration. 



In the dooryards of the cottages adjacent to the hotel, 16 

 species now occur where 13 were living in 1914. Chenopodium 

 album, Trifolium hybridum, and Verbascum Thapsus of the older 

 list have disappeared, while Capsella Bursa-pastoris, Dactylis 

 glomerata, Poa annua. Polygonum aviculare. Sisymbrium altis- 

 simum, and Trifolium pratense have appeared. Dactylis glom- 

 erata did not occur in the vicinity in 1914; all the others were 

 found in the immediate vicinity or along the main road leading to 

 this summer resort. 



Around the three cottages farthest from the hotel, 7 species 

 occurred in 1914 and 13 in 1917. None of the earlier list has 



