54 MIDDLESEX FLORA. 



AUTHEMIS, L. 



A. COTULA, L. (Maruta Cotula, DC, Man.) Mat-weed. 



Very common. July-Sept. Nat. from Bu. 

 A. arvensig, L. COEN Chamomile. 



Lowell (Dr. C. W. Swan) . June-July. Adv. from Eu. 



Achillea, Vaill. 



A. Millefolium, L. Yaerow. 

 Very common. Form with pink flowers not uncommon. July- 

 Sept. 



Chktsanthemum, Tourn., L. 



C. Leucanthemum, L. (Leucanthemum vulgare, Lam., Man.) Ox- 

 ETE Daisy. White-weed. 

 Very common. June-July. Nat. from Eu. 



C. Farthenium, Pers. (Leucanthemum Parthenium, Godron, Man.) 

 Peveefew. 



Dracut, roadside (Dr. C. W. Swan) ; Maiden (P. S. Collins) ; Wal- 

 tham List. Escaped from gardens. July-Aug. Int. from Eu. 



C. Balsamita, L., var. tanacetoides, Boiss. Costmaet. Mint Gera- 

 nium. Mint. Goose-tongue. 



Persistent in old gardens and occasional by the roadside. Aug.- 

 Sept. Adv. from Asia. 



"A rayless or discoid form, known by its sweet-scented herbage, 

 barely serrate oblong leaves, and yellowish flowers ; when the rays 

 appear they are white." Syn. Fl. N. A. 



Mateicaeia, Tourn. 



M. discoidea, DC. 

 N. Chelmsford, wool-waste (Rev. W. P. Alcott ; specimen in herb, 

 of) . Adv. from Cal. 



Tanaoetum, Tourn. 



T. VULGAEB, L. TANST. 



Common by the roadside; including var. ceispum of the Man., 

 which is not uncommon. July-Aug. Nat. from Eu. 



Aetemisia, Tourn., L. 



A. VULGAEIS, L. MUGWOET. 



Lowell and Carlisle (Dr. C. W. Swan) ; Maiden and Somerville 

 (P. S. Collins) ; Marlboro (Mrs. A. M. Staples). Aug.-Sept. Nat. 

 from Eu. 



