1908] Rich,— City Botanizing 153 
leaves grows in scattered colonies to а height of six and eight feet and 
near by can be usually found dense masses of Bocconia cordata Willd. 
attaining an equal height. Various species of sunflowers enliven 
the masses of vegetation, the most interesting among them being 
Helianthus tuberosus L., Helianthus strumosus L., апа Silphium 
perfoliatum L., the last species being especially conspicuous. Inula 
Helenium L. has been noticeable in one of the lots for several years. 
Polygonums occupy large areas, the principal species being Poly- 
gonum Pennsylvanicum L., P. lapathifolium L., P. Persicaria L., and 
frequently P. orientale L. Both species of Datura are found, D. 
Stramonium L. and D. Tatula L., and the velvety-leaved Abutilon 
Avicennae, Gaertn. is occasionally seen. Lespedeza capitata Michx. 
is abundant and Senecio vulgaris L. and S. viscosus L. have been col- 
lected. Ipomoea hederacea Jacq., Petunia nyctaginiflora Juss., 
Campanula rapunculoides L., and the canary grass, Phalaris Canarien- 
sis L. can be usually found this month on dumping grounds. Artemi- 
sia caudata Mich. is abundantly distributed over the gravelly levels 
and, oc 'asionally, in damp places, a few plants of Lythrum alatum 
Pursh. have been seen. "Phe large-headed burdock, Arctium Lappa 
L. var. majus Gray, is somewhat frequent on gravelly banks. 
Cyperus speciosus Vahl. I first collected here in August, 1879, and 
it was still in existence in August of the present year. Among the 
numerous grasses are Panicum miliaceum Willd., Panicum Walteri 
Pursh, Eragrostis Purshii Schrader, Bromus tectorum L., and Phrag- 
mites communis Trin. ‘The Phragmites I think must be of com- 
paratively recent introduction as it has not yet attained the flowering 
stage. Itis also abundant and spreading in the South Boston locality. 
September is, perhaps, if a choice must be made, the best month 
of all for this kind of botanizing. Most of the August plants are still 
lingering in flower, while belated species are pushing forward to com- 
plete their cycle of Ше.  Noteworthy among the Compositae at this 
season are Aster Novae-Angliae L. and Aster subulatus Michx., the 
latter species very abundant in the marshy lots. In September, 1879, 
I found Helianthus rigidus Desf., but it has been long since covered 
up. Pluchea camphorata DC., one of our native plants, still main- 
tains itself in certain lots. Artemisia biennis Willd., mentioned in the 
Sixth. Edition of Gray's Manual as rapidly extending eastward from 
the West, has since that time arrived in Boston and is now common, 
