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Q24 -E. Tuckerman on New Engiand Plants. 
Arr. Xx, = oleae aaa some New England Plants, with 
characters of several new species ; by Epwarv Tuckerman, A.M. 
‘Svsctans aquatica. This plant has been entirely unknown 
in this country since its discovery by Mr. Nuttall in the ponds of 
aine, and was sought for unsuccessfully, at Nuttall’s sta- 
sion by Dr. Robbins. In 1844, I was so fortunate as to meet 
with it growingabundantly, in. about a foot of water, in company 
with Isoétes lacustris, on the gravelly bottom of Echo Lake, 
Franconia Notch, N. H. I have not observed it in any. other of 
the numerous ponds of the White plane oe and it is possibly 
oe local. 
Epivosium alpinum, ? fontanum, (Wahl: ): foliis ovatis dentic- 
latin Wahl. Lapp. p. 98 
- Has. About rivulets in the alpine region of the White Moun- 
tains} and oecasionally descending, along the streams. A taller 
(often 6 to 8 in. high) and stouter plant than the true E. alpinum, 
with larger ovate leaves, obtuse but tapering above, and always 
distinetly,denticulate. . 
‘E.. alpinum, 7 nutans; (Hornem. bE ’ foliis lineari-lanceolatis ob- 
tusis obsolete denticulatis, caule paucifloro sparsim crispulo-pubes- 
centi, siliquis ecano- 2 gi go us. H. nutans, Sommer. 
Suppl. Fl. Lapp. p. 17, Fide J. Vahl! E. alpinum, mutans, 
Hornem. Fil. : Occ: ci ft. Sommer erf.* 
Has. Alpine a of the White Mountains, in rather dry 
soil, not rare.’ Always distinguishable by its nodding, common- 
ly solitary flower, and the hoary pubescence of the pods. It ap- 
pears somewhat nearer than Sommerfelt’s plant to E. palustre, and 
differs in some’ respects from the description of the Norwegian 
author, but was recogiized as belonging to his species by the ex- 
cellent northern botanist above cited. 
Poramoc This genus will reward more attention than it 
‘seems i to have received hete. Characters of two species, sup- 
to be omega were given by me in this Journal in 
and subsequent investigation has not: only confirmed my 
onthe of see. Be nntene of these two, but has brought to light 
several others that seem to be imnioticed by authors. The de- 
scriptions which follow, have been made ‘from living plants, 
every case. I have similar notes already collected respecting 
many of our better known species, and hope on a future occas- 
ion, to continue these sketches, and perhaps thus acquire suitable 
material for a survey of the whole genus, as represented with us. 
P. pulcher, (Tuckerm.): caule simplici verrucoso ; foliis om- 
nibus petiolatis ; submersis membranaceis pellucidis, infimis oval- 
ibus spatulatisve superioribus lanceolatis basi acutis = atten- 
Ualis acuminatis, multi-nervibus undulatis; natanti coria- 
