﻿THE FERN BULLETIN 



83 



Isoetes riparia (Englm.) River bank Quillwort. 

 On the Delaware river shore of the southeastern plain 

 in Bucks, Philadelphia and Delaware counties. Orig- 

 inally collected by Nuttall near Philadelphia and until 

 recently was considered peculiar to the Delaware. As 

 Isoetes saccharata is known to grow on the New Jersey 

 shore of the Delaware, its discover}- in Pennsylvania 

 is to be expected. 



Philadelphia, Penna. 



LYCOPODIUM ADPRESSUM FORMA POLYCLA- 

 VATUM FROM SOUTH CAROLINA. 



BY W. C. COKER. PROFESSOR OF BOTANY UNIVERSITY OF 

 NORTH CAROLINA, CHAPEL HILL. 



This peculiar form of lycopod was first described 

 from Staten Island, N. Y. by McDonald and Clute 

 in the Fern Bulletin vol. 9, page S. 1901, and has re- 

 cently been again reported by Clute from Florida 

 {Fern Bulletin vol. 17, page 45, 1909.) While col- 

 lecting at Hartsville, South Carolina, on the upper 

 edge of the coastal plain in August, 1908, I found a 

 number of good specimens of this rare and interesting 

 form. The plants were all growing together within 

 an area of a few square yards near the edge of an arti- 

 ficial lake. From the accompanying photograph of five 

 of these plants it will be seen that the characteristic 

 proliferation at the top of the upright fruiting stems 

 varies all the way from slender and quite separate 

 branches to broom like confluent expansions that re- 

 semble fasciations. AH or nearly all of these prolifer- 

 ations were sporebearing. 



Is this peculiarity the result of some peculiar en- 

 vironment or accidental injury? It would seem at 

 least possible that it is due to the cutting off of the 



