168 Rhodora [SEPTEMBER 
(Aster novi-belgii L. Mrs. Flynn’s record in Bull. 7 Vt. Bot. Club, 
16, based on a doubtful report of mine, should be erased.) ] 
*BIDENS VULGATA Greene. Shore of Winooski Hiver, alt. 240, 
Essex Junction, 25 July (2229). 
*EUPATORIUM PERFOLIATUM L. var. TRUNCATUM Gray. Sandy 
shore of Malletts Bay, Colchester, 9 August (2657). 
*E. purpurEUM L. Edge of woods along Winooski River, alt. 235, 
Zssex Junction, 21 July (Blake 2039). On the doubtful list of the 
state flora since 1900, now first definitely reported. 
FE. PURPUREUM L. var. FOLIOSUM Fernald. Along brook, Essex 
Junction, alt. 310, 20 July (1970). Also new to the state. This and 
the preceding identified by Dr. Robinson. 
LACTUCA CANADENSIS L. var. MONTANA Britton. Beside road, 
Burlington (a single plant). 
PRENANTHES TRIFOLIOLATA (Cass.) Fernald. Dry bank, Essex 
Junction. 
TANACETUM VULGARE L. var. crispum DC. Pasture (about old 
house-site), Williston; sandy shore of Malletts Bay, Colchester. 
STOUGHTON, MASSACHUSETTS. 
A PECULIAR VARIETY OF THE CANOE BIRCH. 
M. L. FERNALD. 
IN the genus Betula the 3-lobed bracts of the pistillate aments are 
so nearly universal as to be used as a generic character. In fact, so gen- 
eral is this character that the little shrub of the tundra of Newfound- 
land, southern Labrador and adjacent Canada, B. nana L., var. 
Michauxii (Spach) Regel, in which the bracts are commonly quite 
simple and oblong in outline, was made by Opiz a separate genus, 
Apterocaryon.' In habit, foliage, pubescence, nutlets, ete., this little 
shrub is, however, very similar to the polar B. nana, and, as already 
pointed out by the writer,? specimens occur which show a transition 
from the simple bract of the variety to the 3-lobed bract of the typical 
form of the species. 
! Opiz, Lotus; v. 258 (1855). 
? Fernald, Am. Jour. Sci., ser. IV. xiv. 187 (1902). 
