11. 



together, they usually were tangled into one huge mass. 

 At the base of the trunk, the mosses inhabited the north 

 side of the tree as well as the northeast and northwest 

 sides.At this height no mosses were present on the 

 south side;higher up into the crown, on the contrary, 

 mosses alone occurred on the south side while the fern 

 inhabited only the northwest, north, sjid northeast 

 sides.The bryophytes associated with the fern on the 

 oak were Leucodon .iulaceus . Clfflnatodon parvulus rupestris. 

 and Frullania vir^inica.The lichens were Epra chlorina. 

 Parmeli a centrata,and Pertusaria wulfenii , These occurred 

 chiefly on the upper branches where no other green 

 epiphytes were present, while Parmelia perforata inhabited 

 both the upper branches and the parts of the trtmk 

 devoid of green epiphytes, At the base Leptogium sp, 

 was common only on the north side of the tree. 



Station #7 was situated in Starkville, Mississippi 

 one and one-half miles from A & M College. There the 

 distribution of the polypody was. studied on the trees 

 aljng the city streets, It was found that Ulmus americana 

 was the only tree thickly inhabited by the fa:'n whidi 

 was always associated with various mosses. On this 

 elm the polypody was not limited to amy particular 

 exposure, nor to any particular height. On individual 

 trees of Que reus stellata in this region the polypody 

 was confined only to the upper part of the tree 

 inhabiting the thick lateral branches and the trunk 



