THE FERN BULLETIN 



115 



bearing parts, or son, extending around the sinuses 

 as the hollows between the lobes of the pinnae are 

 called. As is well-known, the spore-cases of Pteris 

 spring from a sort of continuous vein-like receptacle 

 along the edges of the pinnules, but stop short of the 

 base, while in Lonchitis they are usually most abund- 

 ant at the base though they may also extend to the 

 apex of the pinnules in a more or less interrupted and 

 sinuous line. 



Putting a good supply of the fern in press we took 

 a last look at the shaggy wilderness and turned upon 

 our homeward trail. We left plenty of plants for the 

 future collector. All he has to do is to follow our 

 trail and get them. — VVillard N. Clute in Amateur 

 X at ura list. 



PTERIDOGRAPHIA. 



Distribution of Dicksonia. — In connection with 

 the notes on the distribution of the boulder fern 

 (Dicksonia punctilobula or D. pilosiuscula) it may be 

 noted that this fern is a most abundant species on all 

 the high ridges that cross the central and western part 

 of the State of Pennsylvania. The editor of this maga- 

 zine saw an abundance of it along the Pennsylvania 

 railway between Driftwood and Buffalo. It was es- 

 pecially plentiful near the summit over which the rail- 

 way climbs in leaving a tributary of the west branch 

 of the Susquehanna and continued almost to Olean. 

 As level country is approached it disappears and as 

 Dr. Hill notes, is rare about Buffalo. Those who have 

 seen the fern growing at its best cannot have failed to 

 note it preference for rough and broken country. It 

 is quite clear that it avoids the level though a mere 

 matter of low altitude does not affect it. Why level 



