380 BICKNELL: FERNS AND 
Thalictrum polygamum Muhl. Previously admitted because 
of Mrs. Owen’s record on the authority of Mr. Dame. The dis- 
covery that Thalictrum dasycarpum Fisch. & Lall. occurs on Nan- 
tucket now makes necessary a substantiation of this record. 
Sassafras Sassafras (L.) Karst. Trees as high as twelve to 
fifteen feet were seen in Shawkemo and Quaise, and in Squam one 
not less than eighteen feet, its trunk twenty-three and one quarter 
inches in circumference one foot above the ground. | 
Radicula palustris (L.) Moench. Waste ground north of the 
‘ town, June 9, I91I, a group of plants just in flower; bog near 
Oldest House, August 18, 1915, herb. Grace Brown Gardner. 
Erysimum cheiranthoides L. Recently collected by Miss 
Gardner on the Cliff road, a second station for Nantucket. 
Conringia orientalis (L.) Dumort. Yard on North Water 
Street, June 17, 1911, one well-fruited plant; waste ground at 
' Surfside, July 9, 1912, several fruiting plants and one just in bloom. 
Reseda lutea L. A few plants in a field near Island Home, 
just in flower June 14, 1911; Fay farm, Squam, July 11, 1912, in 
flower and fruit. The original station in Polpis mentioned by 
Mrs. Owen was visited by Mr. Floyd in 1895; some plants were 
still growing there ‘‘although subjected to occasional mowing.” 
Drosera rotundifolia L. Racemes of buds but no open flowers, 
_ July 6, 1912. On Martha’s Vineyard belated flowers of this 
sundew, as of the next, persist into September. 
Drosera intermedia Hayne. D. longifolia L. in part. First 
flowers July 9, 1912. 
Drosera filiformis Raf. Not yet in flower July 2, 1912. 
Rosa cinnamomea L. Here and there by fieldsides and fence 
borders in the suburbs. 
Amelanchier nantucketensis Bicknell. Further observation of 
this shadbush, later in the summer than I had previously studied 
it, show that the fruit ripens early in July, when it is red or purple 
in color, later becoming deep purple blue. By the middle of the 
month the shrubs, sometimes even those of the smallest size, may 
be seen thickly ornamented with the glaucous fruit in all stages of 
