271 
We miss “P. plantagineus, Du Croz, var. Jamaicensis,’ Griseb. 
which occurs in St. Domingo, and Hog Island, Bahamas fide 
Baker in Herb. Kew. I have not seen this variety in fruit, though 
the general habit and texture of leaves are certainly like Du Croz, 
plant, which, however, must bear the name of P. coloratus, Hornm. 
(1813). 
P. occidentalis, Sieb., P. fluitans, Griseb, is another not named, 
occurring in Porto Rico; St. Domingo, Jamaica, Martinique and 
Cuba. 
Dr. Morong considers me in error in saying “I believe P. 
Nuttallit, Cham., to be P. Oakesianus, Robbins.” Perhaps he is 
right, but I have never yet been able to trace the specimen on 
. which Chamisso founded the species. 
The query as to the name P. Claytonit, Tuck., must bear will, I 
think, be disposed of by its being hereafter found that it is repre- 
sented by P. ephydrum, Rafinesque (1808); if so, this will long 
antedate any other name. 
I am thoroughly in accord with the writer in retaining at pres- 
ent Tuckerman’s P. donchites. It has yet to be shown what the two 
or three ? forms passing under the name of P. fluitans, Roth, in Eu- 
rope represent; and though a certain amount of feeling has been 
imparted into the fwitans discussion, this neither helps on the truth 
or theme ; only patient work will elucidate these difficulties. But 
in the next, P. Faxoni, 1 cannot agree with Dr. Morong. Certainly 
different plants have been distributed, with but two specimens 
seen by me, and on which I grounded the opinion quoted by Dr. 
Morong, the upper leaves might well have been taken off P. Clay: 
Zoni, and the leaves were about identical with Irish specimens of 
vufescens ; while later specimens I am unable to seperate from 
lonchites. 
The hybrid difficulty is well shown by P. spathuleformis, Mor- 
ong. Here what certainly seems a certain amount of injustice to 
Dr. Morong comes in, because the mere fact of publication by 
Mr. Fryer of Dr. Morong’s herbarium name of P. varians constitutes 
the name of the plant without doubt, if recognized as a species, 
and we must write P. varians, F ryer. 
As to P. Mlinoensis, I quite agree with Mr. Fryer in joining this 
to the ducens group, in contradiction to Dr. Tiselius, who puts it 
to P. ( Jiuitans) lonchites. 
