77 



limited to one plane than those of L. complanatum. The branches 

 by their abundance make a very heavy top. Mounted specimens 

 generally have a heaped appearance, the branches lying upon 

 each other in several layers, while specimens of L. complanatum 

 are nearly or quite fiat. The time of collecting has been August 

 and October. The bracteal leaves and sporangia have been found 

 to be yellow as early as August 2d, and the spores beginning .to 

 be shed. In October the sporangia had all become empty. One 

 obtained at Ha ! Ha ! Bay, Quebec, Can., August 25th, was less 

 mature, the sporangia closed and the bracteal leaves but slightly 

 yellowed. Others collected at the same time were shedding 

 their spores. Climatic reasons will probably account for the 

 later ripening. In the same region the Early Blueberry (Vacci- 

 niuvi Pennsylvanicum) and the Canada Blueberry ( V. Canadense) 

 were found to be contemporary in the ripening of their fruit. 

 They grew intermingled, the fruit of both equally abundant on 

 the bushes. In the latitude of Chicago the former begins to 

 ripen the last of June ; the latter, occurring a little farther north, 

 ripens in August. 



The following are the stations and times of collecting the 

 specimens of L. tristachyum Pursh, in my possession : Fruitport, 

 Mich., August 2, 1872; Indian River, Mich., August 3, 1878; 

 Miller, Ind., October 2, 1881; Ha! Ha! Bay, Quebec, Au- 

 gustus, 1888. The three former localities are contiguous to 

 Lake Michigan, Miller being in the dune region at the head 

 of the lake, Indian River in a dune locality near its northern 

 end, and Fruitport midway on the eastern shore. From all I 

 recall about the Lycopodiums I had identified as L. complana- 

 tum, but did not take specimens for preservation, I feel quite safe 

 in stating from the impression its habit has left in memory that 

 L. tristachyum is the more common in places where I have met 

 with the two species in the upper lake region. Those grow- 

 ing at Miller, Ind., do not seem to fruit very freely, the shoots 

 being commonly found barren. 



Chicago, III. 



