1899] Hosmer,— Additions to the flora of Middlesex Co. 223 
viz., at about half past three o'clock a.m. in the month of August, or 
fully an hour before sunrise, and while it was so dark that the aid of a 
lantern was necessary to distinguish the violet and purple blossoms. 
On bright days these flowers begin to droop at 9 A.M. and are perma- 
nently closed by noon. 
There are other colored night bloomers besides the lavender-purple 
Datura. For example, Lychnis dioica, a pink flower, expands its petals 
between 6 p.m. and midnight. 
New BEDFORD. 
FURTHER ADDITIONS TO THE FLORA OF MIDDLESEX 
COUNTY, MASS. 
ALFRED W. HOSMER. 
IN collecting plants in Concord, Mass., and neighboring towns for 
the past ten years, I have found the following which are not given in 
Dame & Collins’ Flora of Middlesex County, or if mentioned are - 
spoken of as rare. In the latter case I add a new station. 
Anemone Pennsylvanica, L. Dry open roadside in the northern 
part of Concord. 
Cardamine pratensis, L. Quite abundant in wet meadows in 
Weston. : 
Viola canina, var. Muhlenbergiit, Gray.  White-flowered form, 
found in Concord and Acton, persistent for many years. 
Malva sylvestris, L. Dry open roadsides, Concord and Acton. 
Erodium moschatum, Willd. "Very abundant in an asparagus field, 
Concord, where only commercial fertilizers had been used. 
Polygala paucifolia, Willd. Violet-flowered form, found in Sudbury 
in 1893, spreading. 
Lathyrus pratensis, L. Found in a cultivated field, Concord in 
1891. 
Spiraea tomentosa, L. White-fowered form, found in Carlisle. 
Rubus Canadensis, L. Double-flowered form, beside a railway 
track, Concord, 1893, spreading. 
Rosa canina, L. Persistent in Concord at three stations for some 
twenty-five years. 
Echinacea purpurea, Moench. Persistent at Acton for seven years. 
Cnicus horridulus, Pursh. Concord at two stations and spreading. 
Eu vo 
