154 Rhodora [SEPTEMBER 
and Bidens vulgata Greene, which a few years ago I thought rare is 
abundant on every hand. 
Polygonum prolificum Robinson is plentiful in damp ground inside 
the Park, and in 1905 Mr. Henry A. Purdie brought me specimens of 
Polygonium exsertum Small from the same place, where I have seen 
it every year since. Last year I came across a few plants of what 1 
make out'to be Chenopodium Boscianum Moq., the only time I have 
ever collected it. Chenopodium Botrys L. is occasionally found and 
C. ambrosioides L. var. anthelminticum Gray is abundant. Rumex 
pallidus Bigelow has been collected several times and Amarantus 
blitoides Watson, forming flat mats in waste ground, can generally be 
found this month. Cassia Chamaecrista L., Urtica dioica L., Pycnan- 
themum lanceolatum Pursh, and Echinocystis lobata Т. & С. are occa- 
sionally met with. Euphorbia Esula L. grew here some twenty or 
more years ago but has now disappeared. 
Last year Mr. Purdie called my attention to a goldenrod which he 
found somewhat puzzling. I made it out to be Solidago asperula 
Desf. and the identification was afterwards verified by Prof. Fernald 
of the Gray Herbarium. ‘These particular plants seem to have more 
of the rugosa character in them than is usual with those 1 had hereto- 
fore seen, and I am more than ever of the opinion, of which there has 
long been a suspicion that the so-called Solidago asperula Desf. is 
really a hybrid of S. sempervirens L. and S. rugosa Mill. 
Two shrubs whose origin here can be directly traced to the neighbor- 
ing Park are becoming noticeable in several of the lots. They are 
Baccharis halimifolia L. and a Tamarix, the species of which І am not 
sure of. Another herbaceous plant, probably from the same source, 
is conspicuous with its handsome blue flowers on several gravelly 
banks in August and September. My first identification of it was 
Lycopsis arvensis L., but Dr. E. H. Eames of Bridgeport, Connecticut, 
to whom specimens had been sent, pronounced it Anchusa officinalis 
L., which is probably correct. These two species bear very close 
superficial resemblances. 
The nomenclature used in this list is mostly that of Gray’s Manual, 
Sixth Edition, while the names of the garden plants mentioned are 
those in common use by horticulturists. 
I look forward with interest to continued investigation of the flora 
of this region while it lasts. But the area is being gradually restricted 
as section after section is built upon and the time is not far distant when 
