23 
Island and in all other parts of our district. Mr. Hall correctly ob- 
serves that it is by no means. confined to “rocky hills” as Gray’s 
Manual seems to imply; it flourishes, for example, on the sandy 
plains of Long Island. Difficulties in the way of proof-reading may 
account for this omission, and other blemishes in our last number. 
55, Synchronism.—If several species are found growing in the same 
situation, near each other, and under the same conditions, the pro- — 
bability is great that their respective stages of forwardness will in- 
dicate the true periodical relations of these plants to each other, 
better than the dates of specimens gathered in different situations 
and at different times. If we had a sufficiency of such data, we 
could correlate the periods in the life of all our plants. We are 
desirous of attempting something of this sort; and request those 
interested to send us from time to time, during the season, speci- 
mens of at least three or four species gathered at the same time 
and in the same spot, with the date, and situation; or, if it is in- 
convenient to send specimens, to send a statement. It is evident 
that we should have here material valuable for the catalogue in 
other ways. It is desirable but not necessary for the specimens to 
be named, and no native plant, with trace of flower or fruit, would 
be inappropriate. 
56. Materials for the Catalogsne—We have received an interestinS 
communication from Dr. O. W. Morris, respecting the Flora of the 
island of New York. We had thought to publish in a separate ar- _ 
ticle, but for economy of space conclude that it is better to indicate 
for the future by the letters N. Y. the plants that are or have been 
found on the Island, and take some opportunity, hereafter, to name 
those already on our list and not thus specified. 
We wish much that our friends would bestir themselves, both to 
get for us local lists, and to supply the Herbarium with specimens. 
At present, the only district tolerably well known to us, 18 our island, 
and that, only for the orders included in Gray’s Manual. As an 
illustration of the interest of local lists, we may mention that we 
have lately discovered that there is a region north of us, including 
parts of Westchester, Dutchess, and Ulster Counties, where Clay- 
_donia is rare or altogether absent. In a trip to Ulster County this 
Spring, we did not see Anemone nemorosa ; and we learn from é 
engage Westchester Co., that Houstonia cwrulea is not found 
ere. 
LEGUMINOS 2. 
LUPINUS, Tourn.—L, perennis, L. ; not uncommon in sandy soils, in 
New Jersey, and on Long Island ; Orange Co., Austin 
CROTALARIA, L.—C. sagittalis, L. ; common in sandy soil; N. Y. 
TRIFOLIUM, L.—t. arvense, L. ; common.—T. pratense, L. ; common.— 
Tt. repens, L. ; common.—, agrarium, L. ; common.—T, ec al . 
bens, L. ; not uncommon ; var. minus, not so common; New — 
York Island, O. W. Morris: all N.Y. slic 
