MIDDLESEX FLORA. 53 



B. chrysanthemoides, Michx. Larger Bur-Marigold. 



Natick (Austin Bacon) ; Acton (Dr. C. W. Swan) ; Bedford and 

 Billerica (C. W. Jenks) ; Concord (Minot Pratt). Not very com- 

 mon, and not reported in the northern part of the county. Aug.- 

 Sept. 



B. Beckii, Torr. Water Marigold. 

 Lowell, Bedford, Woburn, Ashland, et al. Not very common. 

 Aug.-Sept. 



B. bipinnata, L. Spanish Needles. 

 Lowell, "dump" (Dr. C. W. Swan). Aug.-Sept. Adv. from 

 farther west. 



Hemizonia, DC. 



H. fasciculata, Torr. & Gray, var. ramosissima, Gray. 

 N. Chelmsford, wool-waste (Rpv. W. P. Alcott). Adv. from Cal. 

 For description, see Gray, Syn. Fl. N. A. 



Layia, Hook. & Arn. 



L. platyglossa, Gray. Tidy-tips. 

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

 of). Adv. from Cal. For description, see Gray, Syn. Fl. N. A. 



Baeria, Fisch. & Meyer. 



S. gracilis, Gray, var. tenerrima, Gray. 

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

 of). Adv. from Cal. For description, see Gray, Syn. Fl. N. A. 



B. uUginosa, Gray. 



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

 of). Adv. from Cal. For description, see Gray, Syn. Fl. N. A. 



Ch^nactis, DC. 



C. glabriuscula, DC 



N. Clielmsford, wool-waste (Rev. W. P. Alcott). Adv. from Cal. 

 For description, see Gray, Syn. Fl. N. A. 



Helenium, L. 



*II. mitumnale, L. Sneeze-Weed. 



Concord, int. from 111. by Minot Pratt. Sept. 

 E. tenuifolium, Nutt. 



Lowell, "dump" (Dr. C. W. Swan) ; Maiden, cotton-waste, Gould- 



ing's Mill (F. S. Collins). Adv. from the South. For description, 



see Woods Bot. & Fl. 



Galinsoga, Ruiz. & Pav. 



*G. PARVIFLORA, Cav. 



Cambridge, waste places (Man. 2d ed.) Locally nat. from So. Am. 



