MIDDLESEX FLOE A. 55 



A. biennis, Willd. Biennial Wormwood 

 Cambridge (C. E. Perkins) ; Billerica (Dr. C. W. Swan). Aug.- 

 Sept. Adv. from the West;, and tending towards naturalization. 



A. Absinthium, L. Wormwood. 

 Cambridge (C. E. Perkins) ; Medford (G. E. Davenport) ; Maiden 

 (F. S. Collins) ; Groton (Dr. C. W. Swan). Aug. Nat. from Eu. 



A. Stelleriana, Bess. 

 Tewksbury, a garden escape (Dr. C. W. Swan) ; Cambridge, grow- 

 ing in the sand on the bank of the Charles (Walter Deaiie; speci- 

 men in herb. of). Int. from the north-west coast, and locally nat- 

 uralized. "A foot or two high from a creeping ligneseent base, 

 robust, densely wliite-tomentose, the tomentumof the stem cottony ; 

 leaves obovate or spatulate in outline, sinuately or incisely pinnati- 

 fid; lobes obtuse; corolla glabrous; akenes a line and a half long, 

 oblong, not contracted at summit; tlie coat utricular." Syn. Fl. 

 N. A. 



Gnaphalium, L. 



G. decurrens, Ives. Everlasting. 



Dunstable and No. Acton (L. L. Dame) ; Medford and Ashby (Dr. 



C. W. Swan) ; Framingham (Rev. J. H. Temple) ; Woburu and 



Medford (Wm. Boott). Widely distributed, but nowhere common. 



Julj'-Sept. 

 G. polycephalum, Michx. Everlasting. 



Common. Aug.-Sept. 

 G. uliginosum, L. Cudweed. 



Common. July-Sept. 

 G. purpureum, L. Purplish Cudweed. 



Lowell, "dump" (Dr. C. W. Swan). June. 

 Anaphalis, DC. 

 A. margaritacea, Benth. & Hook. (Antennaria margaritacea, 



R. Br., Man.) Pearly Everlasting. 



Common. Aug.-Sept. 



Antennaria, Gaertn. 



A. plantaginifolia, Hook. Ladies' Tobacco. 

 Very common. April-May. 



Erechtites, Raf. 



E. hieracifolia, Raf. Fireweed. 



Very common. Aug.-Sept. 



Senecio, Tourn. 

 S. vulgaris, L. Gkoundsel. 



Somerville (C. E. Perkins) ; Marlboro (Mrs. A. M. Staples) ; 



Lowell (Dr. C. W. Swan) ; Medford and Maiden (F. S. CoUins). Not 



common save in the towns near Boston. July-Oct. Nat. from Eu. 



