1900] Knowlton, — Flora of Worcester county, Mass. 20I 
FURTHER NOTES ON THE FLORA OF WORCESTER 
COUNTY, MASSACHUSETTS. 
C. H. KNOWLTON. 
DuniNc the past year I have collected extensively about Webster, 
one of the southern towns of Worcester County, Massachusetts. 'The 
results have been very satisfactory. Thompson, Conn., joins Webster, 
and also affords an interesting botanical field. I have been greatly 
assisted in observation by Mr. L. J. Spalding, of Webster, and have 
frequently compared notes with Mr. R. M. Harper, of Southbridge. 
Mr. Joseph Jackson's County Flora, has also been of great assistance. 
The asterisk indicates plants not included in that work. 
* Ranunculus repens, L. Thoroughly established in and around 
a brook at East Webster. This crowfoot is rare in interior Massa- 
chusetts, and may be introduced. 
Xanthoxylum Americanum, Mill. This grows abundantly in 
Thompson, Conn., near the state line, and it is to be expected in ` 
Massachusetts. In Worcester County it has been reported only 
from Millbury. 
* Rubus setosus, Bigelow. Low thicket, East Webster. 
* Lythrum Salicaria, L. Muddy shores of the Quinebaug and 
Maanexit rivers, Dudley and Oxford, in great abundance. Not con- 
sidered common in central Massachusetts. 
Circaea alpina, L. Cold woods. Purgatory Chasm, Sutton, also 
Athol. Very local in the county. 
Cornus circinata, L'Her. Rich woods, Douglas and Sturbridge. 
Linnaea borealis, L. Common, Royalston and Athol. Pre- 
viously reported from Gardner and Templeton, and to be expected 
throughout the northern towns of the county. 
* Aster vimineus, L., var. foliolosus, Gray. Dry fields, Webster. 
The type is common. 
Rhododendron viscosum, Torr., var. glaucum, Gray. Rich woods 
near a brook, Dudley, not far from the Charlton line, but a consider- 
able distance from the station where it was reported by R. M. 
Harper. (RHODORA, ii, 122.) 
Limnanthemum lacunosum, Griseb. Shallow water, Whitin Pond, 
Northbridge. ‘Though not much known in Worcester County, it is to 
be expected in any pond where the level has not been too much 
altered. 
