260 



oiens, may be grounds for assuming a wider distribution for 

 A. Stewardsonii than is now shown by our material. 



2. Arisaejna pusillum (Peck) Nash. The only two specimens 

 of this little known species were collected at the New York Botan- 

 ical Garden and at Hewlet, L. I. Has any one been able to 

 trace its distribution beyond that called for in the manual, viz., 

 " Sunny bogs, southern N. Y."? It seems to be a very local- 

 ized plant, or it may be a mere form of the widely dispersed A. 

 triphyllum (L.) Torrey. 



Lemnaceae 



1. Spirodela polyrhiza (L.) Schleid. There are no specimens 

 from the territory that lies north of New York City. A record 

 exists of its being found at Pine Plains, Dutchess Co., N. Y. It 

 should be found throughout our range but no permanent record, 

 except those given above, is extant. 



2. Lernna trisulca L. This almost cosmopolitan species is 

 known only from West Goshen, Conn., so far as our range is 

 concerned. Any specimens that will show its true distribution 

 in the area will be welcome. 



3. Wolffia Cohimbiana Karst. No specimens at hand were col- 

 lected north of the region about New York City. With a general 

 distribution of " Mass. to Ont., N. J., S. Car.," etc., it seems that 

 our material does not adequately represent the distribution of the 

 species within the range. 



Xyridaceae 



1, Xyris fimbnata Ell. The only specimens are from Atsion 

 and Egg Harbor, N. J. In the Cat. of N. J. plants at least six 

 other stations are given. From where else in New Jersey has 

 this plant been found ? So far as our range is concerned the 

 plant occurs only in southern New Jersey, but our specimens fail 

 to show how far north the plant is to be expected. 



2. Xyris inontana H. Ries. The most northerly station repre- 

 sented in the collections are among the Pocono Mountains of 

 Pennsylvania. Between this and the southerly tip of New 

 Jersey there is an hiatus. Where in the northern part of the 

 pine barren region may the plant be found ? Has it ever been 

 found north of the Pocono country"? 



