392 



BOTANICAL GAZETTE 



[NOVEMBER 



The principal study of B. obliquum was made at Oberlin, Ohio, 

 in the cemetery, a part of which is sparsely covered by the original 

 timber, while the rest is still more sparsely dotted with Juniperus, 

 Pinus, Thuja, and Cupressus. Of the 24 groups which were counted 



+ BOTRYCHIUM OBLIQUUM 

 ©BOTRYCHIUM DISSECTUM 



I I II 1 I 1111 I 



Fig. 2.— Plot about 40X43 m. at Oberlin, Ohio: distances between individual 

 plants of a group approximately correct, but distances between groups A and C, C 

 and D, C and F, and F and G about twice as great as indicated; there is no B. 

 virginianum in this vicinity. 



and plotted, 17 were at this place, 4 at Sullivan, 2 at Cleveland, and 

 1 at Pittsfield. A sample of the plotting at Oberlin is given in 

 tig. 2. 



. It was from such detailed field studies as those shown in 

 figs. 1 and 2 that we reached the conclusion that B. dissectum is a 



