I02 



seem to be the same thing, but further study is urgently needed. 



13. "AUocarya califoniica Greene" (no. 47. Torreya 18: 225) 

 has been described as a new species by Piper in his recent 

 revision of the genus {A. granidat-a Piper). f The type-locality 

 is at Salem. 



14. "Azolla caroliniana Willd." (no. i of the list in Torreya 

 20: 40. 1920) is determined by W. R. Maxon as A. fiUculoides 

 Lam. It is abundant in stagnant water on the shore of the 

 Willamette at Salem. 



15. Xanthium oviforme Wallr. This is not a "species of the 

 Orient," but is indigenous to the Columbia Valley, where it 

 was discovered by Douglas. 



Perhaps the most interesting range-extension of the past 

 season was afforded by the discovery^ of Danthojiia pinetorum 

 Piper {D. thermalis Scribn.) on the top of a rocky clifif on the 

 south side of Oswego Lake in Clackamas Co. The type-locality 

 is in Mason Co. Wash., and the species seems not to have been 

 previously reported from south of the Columbia River. 



Bromus sitchensis Bong., which Piper and Beattie (Fl. N. 

 W. Coast 51) assign to "moist banks along the sea-shore," was 

 found along the dry border of a hop-yard in the Willamette 

 River bottom near Livesley Station, Marion Co., and deter- 

 mined by Agnes Chase, as was the Danthonia also. 



Senecio Harjordii Greenm., which has been regarded as en- 

 demic in the Columbia Gorge, has been found as far south as 

 in the Cascades as Silver Creek Falls in Marion Co., and was 

 obser\-ed in abundance on Bowman Butte in Clackamas Co., 

 about 15 miles northwest of Mt. Hood. 

 Salem, Oregon. 



THE RECORDS FOR LIALXOBIUM SPONGER 

 IN THE NORTHERN UNITED STATES 



By Kenneth K. Mackenzie 



One of the most interesting and at the same time troublesome 

 records for New Jersey is Knieskern's of the rare occurrence of 

 Limnobium Spongia ait Swimming Ri\er, Monmouth County. 

 Nothing has turned up from any part of New Jersey since the 



t Contr. U. S. Nat. Herb. 22, Part 2; 109. 1920. 



