MIDDLESEX FLOKA. 47 



SERICOCARPUS, Nees. 



S. solidagineus, Nees. WHITE-TOPPED ASTER. 



Medford (C. E. Perkins) ; Natick (Austin Bacon) ; Bedford (C. W. 



Jenks) ; Chelmsford (Dr. C. W. Swan). Not very common. July- 



Aug. 

 S. conyzoides, Nees. 



Common. July. 



ASTER L. 



A. corymbosus, Ait. 



Rather common. July-Aug. 

 A. macrophyllus, L. 



Rather common. July-Aug. 



A. radula, Ait. 

 Not uncommon. Aug. 



A. patens, Ait. 

 Common. Aug.-Oct. 



A. laevis, L. 



Typical form and vars. laevigatus and cyaneus, Man. Com- 

 mon. Aug.-Oct. 



A. undulatus, L. 

 Common. Aug.-Oct. 



A. cordifolius, L. 

 Not uncommon. Aug.-Oct. 



A. ericoides, L. 



Westf ord (Misses Fletcher and Hodgman) ; Waltham List ; Med- 

 ford (Mrs. P. D. Richards); Bedford (C. E. Faxon). Sept.-Oct. 



A. multiflorus, Ait. 

 Rather common. Aug.-Oct. 



A. dumosus, L. 

 Not very common. Aug.-Sept. 



A. Tradescanti, L., (not of Man.) 



Cambridge (L. H. Bailey, Jr.) Specimen in Gray Herb. Aug.- 

 Sept. 



A. vimineus, Lam. (A Tradescanti and var. fragilis, Man.) 

 Common. Aug.-Oct. 



A. diffusus, Ait. (A. miser, Man.) 

 Rather common. Aug.-Sept. 



A. paniculatus, Lam. (A. simplex, Willd., Man.) 

 Lowell, Tyngsborough and Marlboro (Dr. C. W. Swan) ; Maiden 

 (F. S. Collins) ; Waltham List; Ashland (Rev. Thos. Morong). 

 Scarce. Aug.-Sept. 



A. salicifolius, Ait. (A. carneus, Nees., in part, Man.) 

 Lowell (Dr. C. W. Swan) ; Maiden (H. L. Moody) ; "woods on 

 Concord Turnpike ; (Bigelow's Fl. Bost.) Scarce. 



