598 



Hill: The Hajutats of the Pellaeas 



to the nver valley and formed a little waterfall where it emerrred 

 from the layers of roek. The projeetinc. faces whieh flanked the 

 basin below the fall were fully exposed to the sunli^rln and were 

 well stocked with the plant. Above the fall was a little rocky 

 glen, in dark shade, moist and covered with various kinds of moss 

 and other shade-loving plants. Here the smaller cliff-brake, Pcllaca 



topu 



bifcra, Marchantia polymorpha and another Liverwort, Astcrclla 



^ph 



crcnce for rocks, but needing shade and „,oisture, as well as moss 

 or decaynig vegetable and roek-matler, in which its slender hori- 

 zontal rootstocks can run. It is the second locahty in which I 



Lave met with this cliff-brake in Illinois, the other being a similar 



cntennrr the Kankakee 



ravine 



river below the city of Kankakee. I have no i.rformatiJn of its 



presence 



th 



for ,t, and it must be here well-nigh the southern limits of its ranrje 



