19 
_4l.  SYNCHRONISM.—The relative tame of flowering of different spe- 
cles 18 a subject that naturally suggests itself to every collector, 
and, by a careful collation of observations, is capable of being well 
systematized. Every botanical excursion ought to furnish some 
materials for this purpose, and we call for contributions. Mr. 
Bower, informs us that of two species of native Dentaria cultivated 
in his garden, D. laciniata, was two weeks in advance of D. maxima, 
showing in this a marked distinction between the two species. 
On the 14th of May, when every apple tree was in bloom, we 
made a short trip to Bergen Neck, and noted two or three points 
in this connection. In a partially drained swamp we found 
Azalea nudiflora and Viola primulefolia in perfection of blossom. 
Some of the heads of this Azalea resembled, in their crowded 
umbel, Rhododendron. The Azalea head has about fifteen long pe- 
duncled flowers, but in these cases, owing to the shortening of the 
internodes, several heads were brought near together, giving a 
close cluster, effective as a mass, but lacking the grace of the sepa- 
Tate ones. Vaccinium corymbosum was in flower close by. 
How long this violet had been flowering we cannot say, and saw 
no other white violets to compare with it. V. cucullata had begun 
appear in this neighborhood more than a month before, but was 
now abundant and tall scaped. V. pubescens seemed to be past its 
prime, although it had not showed itself nearly so early. We be- 
eve that most of our violets have a season of some weeks at least 
before they cease to display their petals, after which, as is well 
known, the stemless ones, at least, produce apetalous flowers 
throughout the summer—Is this change owing to variation in tem- 
perature, moisture, or light, or is it connected with the departure of 
Some insect visitors? Will some one who has the opportunity to 
watch violets report to us the insects they find attracted by them? 
Of Ranunculaceze, Anemone nemorosa had quite disappeared in 
Woods which two weeks earlier abounded in them, and Thalictrum 
dnemonoides, which was scarce at best, had but a few stragglers left. 
Columbine was swinging its red bells over the rocks, apparently 
Sood for a week more at least. Actwa alba was in fresh flower, 
but Cimicifuga racemosa only in bud. Ranunculus abortivus was 
wade having been out several weeks, but 2. recurvatus was 
“lther scarce or just beginning to show its blossoms. - 
Of other sateen Partin Codigo had newly minted its gold. 
Claytonia had been in bloom for more than a month, and was full 
of pods, with a few deep colored blossoms at the top—the sepals of 
these partaking of the deep color and pink veins with the petals. 
nium maculatum was not yet in its prime, and Pyrus arbutifolia 
ly. The buds of Viburnum acerifolium were yet very imma- 
ture, but the Dog-wood silvered the fresh green of the woods, 
While th i oblirwnte Withee 
e male catkins of the Beech we bers cernuum, and Smila- 
_Of Endogens, Arisaema triphyllum, Trilliu nila: 
Cina bifolia lens in good Poet but S. racemosa and Medeola Virgi- 
nica had some time to wait, and Polygonatum biflorum was only par- 
tially expanded. Uvularia perfoliata hung out bright bells, and 
a ypoxys was sparsely showing its yellow stars. 
