276 BICKNELL: FERNS AND FLOWERING PLANTS OF NANTUCKET 
CIRSIUM ARVENSE (L.) Scop. 
Frequent near the town, and occasional elsewhere, but not 
much of it anywhere. First flowers July 1, 1912. 
*CENTAUREA CYANUS L. 
Transient in and near the town. First flowers on strayed 
plants June 6, 1911, June 21, 1910; flowering earlier in gardens. 
*CENTAUREA MELITENSIS L. . 
Waste ground near Surfside, July 9, 1912, a few plants m 
earliest flower. 
During the publication of this series further exploration on 
Nantucket, both by myself and by others, has brought to light a 
considerable number of plants not before discovered there. These 
later additions to the flora will be recorded in an appendix. 
