422 BOTANY. 
over, that the simple-leaved frutescent species (also extra-Euro- 
pean) are the ancestors of those with divided leaves,— but this is 
a speculation of a different character, upon which little or no evi- 
dence can be brought to bear.—A. Gray in American Journal of 
` Science. 
BOTANICAL NoTELETS.— Equisetum arvense is characterized as 
ing, and generally has, its branches 4-sided and the teeth 
four. Milde describes a variety boreale, chiefly high northern, with 
three teeth and 3-sided branchlets. This form is very common 
around Boston, chiefly in grassy places, and it might in the ab- 
sence of the fertile plant be mistaken for E. pratense. It has 
been noticed here for some time, but attention has been osio to 
it by Mr. Wm. Boott. 
Cypripedium acaule with two flowers has been sent by Mr. J. S. 
Scott, of Westfield, Mass. The flowers are approximated, the 
second bract close to and opposite the usual one; and the lips of 
the two of course facing each other. 
Acer nigrum with stipules, at Wabash, Indiana, which Mr. Mills 
brought to our notice last year, holds the character this season, 
not only in the tree first observed but in several others. 
Anemone nemorosa, or trifolia. From the Peaks of Otter, at 
altitude of about three thousand feet, Mr. A. H. Curtiss sends an 
anemone of a form new to this country (although there is some 
approach to it in Oregon), which may be called A. nemorosa with 
undivided leaflets or A. trifolia L., according to the botanists’ 
fancy. It is fully as large as the latter, having the stem a foot 
high up to the leaves, and the leaflets two and one-half inches 
long; the deepness of the teeth of these, and a slight tendency to 
trilobation, should rather refer it to A. nemorosa, which not rarely 
exhibits this state in Europe. This European form, as Mr. Curtiss 
_remarks, appears to have kept company with Convallaria majalis, 
being here associated with it in one of the most northern stations 
of this plant, which in America is restricted to’the Alleghanies. 
Dimorphism in Forsythia. In Cambridge and its vicinity all 
the blossoms of Forsythia suspensa have long filaments and a short 
style; all those of F. viridissima have short filaments and a long © 
style. This was noticed by Mr. Brown, one of my pupils, of the 
present Senior Class. In all probability this is not a specific dif- 
~ ference, but one of dimorphism. That only a'single form of each 
