1923] Fernald,—Estuarine Bidens of the Miramichi 43 
THYMUS. 
T. ovatus Mill. Escaped, Boxford (Mrs. C. N. S. Horner, no 
date). Specimen in herb. N. E. Botanical Club. A native of central 
Europe. 
T. SERPYLLUM L. Dry fields and pastures, occasional. 
T. VULGARIS L., var. VERTICILLATUS Willk. & Lge. Grassy bank, 
Wellesley (K. M. Wiegand, June 2, 1910). An Italian mountain 
plant, found also in Corsica. 
TRICHOSTEMA. 
T. dichotomum L. Dry fields and pastures in sandy soil, very. 
common throughout. White-flowered forms from Revere and New- 
ton, 
C. H. KNowLTON 
Warren DEANE [Committee on Local Flora. 
THE ESTUARINE BIDENS OF THE MIRAMICHI. 
M. L. FERNALD. 
THE peculiar endemic or isolated members of the genus Bidens 
which have been discovered in the tidal reaches from Maryland 
northward to the estuary of the St. Lawrence have been discussed at 
various times in the pages of RHODORA and we have learned that 
every considerable estuary in this region is likely to harbor some 
interesting plant of the genus. It was therefore gratifying, upon 
stopping to spend the night at Newcastle, New Brunswick, during 
a return trip from the Gaspé Peninsula with Professor Arthur Stanley 
Pease, to have our twilight stroll above the city, along the tidal shore 
of the Miramichi, rewarded by the discovery of another of these 
colpophilous plants. The Miramichi plant stands exactly between 
Bidens hyperborea, var. cathancensis Fernald, RHODORA, xx. 149 
(1918) of southern Maine and var. gaspensis Fernald, |. c. 150, of the 
Gaspé river-mouths. In its comparatively thin sharply toothed and 
acuminate leaves, attenuate foliaceous bracts and long awns the 
Miramichi plant is like the former, but in its conspicuously decumbent 
or arched-ascending branches, few-flowered heads with only 3-5 
very long and mostly serrate bracts it suggests the latter. This 
plant on account of its habit may be called 
