96 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 



G. ULIGINOSUM L. A weed well established at the Main Life 

 Saving Station. Listed by J. Macoun. H. St. John, no. 1,344 (H). 

 FL, Fr. August. 



RTJDBECKIA HIRTA L. A weed collected by J. Macoun (C. no. 

 23,439) in 1899 but not observed by the subsequent botanical col- 

 lectors. 



FL August. 



Bidens frondosa L. Listed by J. Macoun. 



B. connata Muhl., var. petiolata (Nutt.) Farwell. See Fernald, 

 Rhodora, x. 200 (1908). Infrequent, at the borders of fresh-water 

 ponds. H. T. Gussow (E); H. St. John, no. 1,345 (H). 



FL, Fr. September. 



[B. CERNUA L. of H. T. Gussow is B. connata, var. petiolata.] 



[ACHILLEA MILLEFOLIUM L. is listed by J. Macoun-, and H. T. 

 Gussow. The material is probably identical with that collected by 

 the author and cited under the following, A. lanulosa.} 



Achillea lanulosa Nutt. Very abundant on the dry dunes and 

 barrens. H. St. John, no. 1,346 (H). 

 FL August. 



ANTHEMIS COTULA L. Thoroughly established at the Main Life 

 Saving Station. Listed by J. Macoun; H. T. Gussow. H. St. 

 John, no. 1,347 (H). 



FL, Fr. August. 



CHRYSANTHEMUM LEUCANTHEMUM L., var. PINNATIFIDUM Lecoq 

 & Lamotte. A weed at the Main Life Saving Station. H. St. John, 

 no. 1,348 (H). 



FL August. 



Senecio Pseudo- Arnica Less. Infrequent in the gulches near the 

 sea and at the top of the beaches. Listed by J. Macoun; and H. T. 

 Gussow. H. St. John, no. 1,349 (H). 



FL, Fr. August. 



CIRSIUM ARVENSE (L.) Scop. A weed thoroughly established near 

 the Life Saving Stations and spreading. Listed by J. Macoun. H. 

 T. Gussow (E); H. St. John, no. 1,350 (H). 



FL, Fr. August and September. 



