1919] — Ganong,— Nichols's Vegetation of Cape Breton — 171 
CoREOPSIS ROSEA Nutt., forma leucantha, n. f., ligulis lacteis. 
Ligules milk-white.— MassaAcHusETTs: wet sandy lower beach and 
inundated margin, Buck Pond, Harwich, August 30, 1918, Fernald & 
Long, no. 17,594 (TYPE in Gray Herb.). 
Typical Coreopsis rosea has, as its name implies, roseate ligules, 
these varying on the one hand to intense rose-purple, on the other to 
a pale pink, but at Buck Pond where the ordinary pink-rayed form 
makes a veritable border of color at the margin of the pond, the 
milk-white form, with no trace of pink in the rays, is also abundant, 
the two suggesting a garden-border of pink and white Cosmos.— 
M. L. FERNALD, Gray Herbarium. 
NicHOLs's VEGETATION OF NORTHERN CAPE BRETON.!— Among 
those who follow this kind of investigation there will be no dissent 
from the statement that Prof. Nichols's work on Cape Breton repre- 
sents by far the most important ecological study yet made on the 
vegetation of northeastern America. The author has chosen a dis- 
tinctive and attractive new field, applied to its problems the most 
modern spirit and method, worked it through parts of four seasons on 
the basis of earlier acquaintance, and embodied his results in a clear, 
orderly, and well-illustrated synoptical monograph. After an intro- 
duction on the general problem, the physical factors involved, and his 
plan of ecological classification and nomenclature, there follows the 
systematic description of all the vegetation groups of the region. The . 
climax vegetation is of course forest, which falls into the two types of 
deciduous and evergreen. These are separately and fully described, 
and then traced as to their development through the successional 
series of xerarch and hydrarch formation types. .The floristic side of 
the study receives full attention, with every evidence of the trust- 
worthiness of the identifications. The treatment of the vegetation 
groups is remarkably even throughout, for which reason it is hardly 
possible to select any parts for special comment, which in any case, 
so far as the present reviewer is concerned, would be wholly favorable. 
No striking new discoveries or major conclusions are announced, 
though various special topics receive full discussion; and diverse 
current views are tested in light of the observations and found some- 
times ‘adequate and sometimes wanting. In the present stage of 
ecological progress, theoretical deductions have little more than a 
temporary and hypothetical value, but exact records of fact are the 
1 Nichols, George E. The Vegetation of Northern Cape Breton Island, Nova Scotia. 
Trans. Conn. Acad. Arts and Sciences, 22, 249-467, 1918. 
