50 MIDDLESEX FLOKA. 



S. sempervirens, Michx. 



Common along the salt marshes. Aug.-Sept. 

 S. neglecta, Torr. & Gray. 



Common. Aug.-Sept. 

 S. neglecta, Torr. & Gray, var. linoides, Gray (S. linoides, 



Soland., Man.) 



Maiden, 1887 (E. H. Hitchings). Sept. 

 S. juncea, Ait. (S. arguta, of Man.) 



Common. July-Aug. 

 S. arguta, Ait. (S. Muhlenbergii, Torr. & Gray., Man.) 



Medford, Lowell, Tewksbury, et al. ; apparently more common in 



the northern portion of the county. July-Sept. 

 S. rugosa, Mill. (S. altissima, L., Man.) 



Common. jAug.-Sept. 

 S. ulmifolia, Muhl. 



Dracut (Dr. C. W. Swan) ; Maiden (H. L. Moody) ; Medford (Wm. 



Boott) ; Melrose and Woburn (Mrs. P. D. Richards). Not very 



common. Aug.-Sept. 

 S. odora, Ait. SWEET GOLDEN-ROD. 



Widely distributed, but not very common. July-Aug. 

 S. nemoralis, Ait. 



Common. Aug.-Oct. 

 S. Canadensis, L. 



Common. July-Sept. A peculiar form near Fresh Pond, with the 



stem perfectly smooth up to the inflorescence; leaves scabrous 



above, ciliate, hairy on the veins beneath, (Walter Deane) . 

 S. Canadensis, L., var. procera, Torr. & Gray., Maiden, 



(H. L. Moody). 

 S. serotina, Ait. (S. gigantea, of Man.) 



Not very common. July-Aug. 

 S. serotina, Ait., var. gigantea, Gray. (S. serotina of Man.) 



Medford (L. L. Dame) ; Maiden (H. L. Moody) ; Stoneham (W. H. 



Manning) ; Waltham List ; Concord (Minot Pratt) . Not uncom- 

 mon. Aug.-Sept. 

 S. lanceolata, L. 



Common. Aug. 

 S. tenuifolia, Pursh. 



Silver Lake, Wilmington (J. R. Churchill) ; Tewksbury (Wm. 



Boott ) ; the Concord plant was introduced from Weyrnouth by 



Minot Pratt. July-Sept. 



GRINDELIA, Willd. 

 G. robusta, Nutt. GUM-PLANT. 



Lowell, "dumps" (Dr. C. W. Swan). Adv. from Cal. For descrip- 

 tion see Gray, Syn. Fl. N. A. 



