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POLYGONUM HYDROPIPEROIDES, Michx., var. STRIGOSUM, Small. 
Very common in slow streams, swamps, etc., in the San Bernardino 
Valley, California, according to Mr. S. B. Parish, who has col- 
lected fine specimens and records its flowering season as October 
and November. Mr. J. W. Congdon has also gathered it at 
Visalia, Tulare county, California, which is some distance north of 
the San Bernardino Valley. The variety holds its character in 
every respect. 
As we have it now from different points east of the Mississippi 
River and from two localities near the Pacific coast, we may ex- 
pect it to be found in the future at intermediate places. 
P. hydropiperoides, as well as the variety strigosum, has an al- 
most invariable character which, it seems, has never been re- 
corded. The stem or branches always produce, at the distance of 
three-fourths of an inch or less above the angle of branching, a 
node with a leaf and ocrea, thus making an internode several 
times shorter than normal length. 
POLYGONUM LITTORALE, Link. Although this species has found 
no place in the text-books or other botanies of our country it is 
not uncommon. Usually, it has been confounded with either P. 
erectum or P. aviculare, neither of which it resembles so closely as 
to render such a confusion excusable. The examination of ma- 
terial, in different herbaria, under the above mentioned names will 
doubtless show that the species is not rare. I find a number of 
botanists, feeling that no allowence was made for this form, have 
left it unnamed in their collections. P. Zttorale is more woody than 
P. erectum and P. aviculare. It spreads out extensively, one plant 
often covering several square yards. Its achene is much broader | 
and less pointed, and also of a darker color (almost black), less re- 
ticulated and more shining than that of P. aviculare. Specimens 
in the Herbarium of the Geological Survey of Canada give us a 
considerable Northern extension of the range, Macoun having 
found it in British America at Silver City, on the Rocky Moun- 
tains, and on open praries near Walsh, N. W. T. 
PoLyGonum Ravi, Babington. For the present we will have to 
consider this as an introduced and naturalized plant. But as it is 
appearing from so many and widely separated localities it may yet 
Prove to be native. It grows plentifully on the coasts of Europe 
