150 Rhodora [JULY 
SERICOCARPUS. 
S. asteroides (L.) BSP. Dry open woods and pastures, very com- 
mon throughout. 
S. linifolius (L.) B S P. Dry open woods and pastures, frequent 
throughout. 
SILPHIUM. 
S. PERFOLIATUM L. Escaped from cultivation to waste land; Dan- 
vers, Cambridge, Boston (Fenway). 
SILYBUM. 
S. MARIANUM (L.) Gaertn. Appeared suddenly as garden weed, 
Lexington (Miss E. L. Shaw, July 27, 1898). Specimen in herb. Gray. 
SOLIDAGO. 
S. altissima L. Open places in rich soil; few records from western 
and southwestern towns, but common elsewhere. 
S. arguta Ait. Woods; occasional from Blue Hills and Dover 
northward. 
X S. asperula Desf. Borders of salt-marshes above high tide; 
frequent from Revere to Scituate, probably elsewhere. 
S. bicolor L. Dry sandy soil, very common throughout. 
S. caesia L. Rich woods, common throughout. 
S. caesia L., var. axillaris (Pursh) Gray. Usually in drier soil than 
the species, occasional. 
S. caesia L, var. paniculata Gray. Rich woods, frequent. 
S. canadensis L. Fields and pastures; common, except in southern 
towns. 
S. canadensis L., var. Hargeri Fernald. Rnopona xvii.11-12,1915. 
Salisbury (A. A. Eaton, no date). Specimen in herb. N. E. Botanical 
Club. 
S. Elliottii T. & G. Rich moist soil; frequent from Hingham, 
Blue Hills, Dedham and Sherborn south, often abundant. This is 
the northern limit of the species in New England, but it reappears 
in Nova Scotia (see Fernald, Rnopona xxiii. 292, 1921). 
S.graminifolia (L.) Salisb. Moistsoil, occasional in northern towns. 
S. graminifolia (L.) Salisb., var. Nuttallii (Greene) Fernald. Fields 
and roadsides, common throughout. 
S. humilis Pursh. (S. uliginosa Nutt. See Ruopora xvii. 6, 1915; 
x. 88-89, 1908.) Very wet meadow, Boxford (E. F. Williams, Aug. 
