Me rye! 
the short styled form, in the bud, the lower set is approximate to 
the upper. This is the one from which the figure in Maout and 
Decaisne seems to have been taken. The second form is that which 
Dr. Torrey describes in his Flora of N. Y., and Dr. Gray in his 
Manual, except: that the latter makes no mention of the style. 
Nuttall notices the variation in the length of the style, which he 
says is “ usually about its [the corolla’s], length, shortest when the 
stamina are most exserted.”” Elliott describes the first form. From 
the illustration of Eichhornia speciosa, in Lindley’s Vegetable 
Kingdom, we should suspect it also of being heteromorphic. 
There are many questions about Pontederia that still require to 
be answered, and we earnestly request those who live in its neighbor- 
hood to examine into them. What insects visit it? There are 
probably three kinds at least, suited to carry off the three forms of 
pollen to their appropriate stigmas. What do the insects seek, or 
where is the honey? Do all the forms ripen seed equally? What 
is the use of the curious glands that beset the flowering parts ? 
Wo Ho is 
§ 178. Cassia.—The three kinds of Cassia that are native here- 
abouts need to be studied in reference to their fertilization. Dr. 
Torrey seems to be the only writer who refers to the fact that the 
anther of C. nictitans, L., though opening at first with pore-like 
slits, finally splits down the whole length. But the other two here 
open only by pores, and I have experimented in vain to find how the 
abundant pollen is discharged. They are both freely visited by a 
large bumble bee. wot. Tk 
§ r79. Lythrum Salicaria, L., is well established on the Northern 
R. R. of New Jersey, near Granton. 
§ 180. Symplocos and Alnus.—Can any of your readers give 
the size which Symplocos tinctoria attains? During a recent 
botanical excursion in Southern-Delaware a specimen was found 
which was thirty-five feet in height, the trunk of which at the base 
was 28 inches, and, 3 feet from the ground, 23 inches in circum- 
ference. I have never seen this trée attain such a size even in the 
Southern States. oe 
On the same trip a specimen of Alnus maritima was measured 
as follows: height 23 feet, circmmference of trunk at base 16? inches, 
These were measured by Mr. Albert Commons and 
Wm. M. Cansy. 
GH § rr. Suffolk County Plants.—I recently had the good fortune 
to discover Zannichellia palustris, L.,in a stream leading into a creek 
near the Sound. Also the following plants: Lathyrus palustris, L.., 
at Wading River; Spergularta rubra, Presl., var. campestris, Gray, 
Myosotis verna, Nutt., and the white variety of Silene Pennsylvanica, 
Mx., at East Hampton; Asclepias incarnata, L., at Long Pond, 
Wading River (the variety pu/chra is very common here) ; Potamo- 
geton Oakesianus, Robbins, at Manorville, Wading River, and River- 
a: Se 
te The ponds on the cliffs at Northville were so dried up, that no 
Hottonia inflata, E\\., could be found, but while looking for this I 
discovered a large quantity of Onopordon acanthium, \.., at a wood 
