392 



BOTANICAL GAZETTE 



[NOVEMBER 



The principal study of B. obliqunm 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 



& 



ii 



A 



r- 



iwi 



m 



C 



353 



it 



tt 



+ B0TRYCHIUM OBLIQUUM 

 41 ©BOTRYCHIUM DISSECTUM 



'I I III I I I I I I I I I I I I I I ITTT 



II 



it 



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. 

 virginianiim 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 

 fig. 2. 



It was from such detailed field studies as those shown in 

 figs. 1 and 2 that we reached the conclusion that B. dis sec turn is a 



