Sratzs Mvusrum or Narurat History. 55 
Mentha piperita, Z. Along streams at Phoenicia a singular form 
was observed. Its flowers were in axillary whorls or clusters as in J. 
sativa, M. Canadensis, etc.; not in terminal spikes as in the ordinary 
form. This marked variation from the usual mode of inflorescence 
gives such a peculiaraspect to the plant that it seems worthy of a name 
and might be called var. inferrupta. 
Mentha Canadensis, /. Very variable. The stems are simple or 
branched; the leaves are ovate or elliptical, tapering at the base or 
abruptly narrowed, grayish-green or purplish; the flowers may have 
the stamens all exserted or all included, or some exserted and some in- 
cluded even on the same plant. Besides, the plant varies from nearly 
smooth to very hairy. 
Lycopus Virginicus, Z. The small few-flowered form (LZ. pumilus, 
Vahl.) with a thickened tuberous root occurs in the Adirondack re- 
gion. 
Polygonum amphibium v. aguaticum, Willd. Common in still or 
slow-flowing water of the Adirondack region. The elongated stems 
creep on the bottom and send up, at intervals, flowering branches 
which bear the thick, smooth, glossy, floating leaves and the brilliant 
red spikes of flowers which enliven and beautify the lonely waters of 
the wilderness. Hach node of the submerged stem gives rise to a 
cluster of rootlets. 
Sparganium simplex y, angustifolium, Gr. The terrestrial form, 
with shorter, erect leaves, occurs at Edmonds ponds. 
Sparganium minimum, Bauwh. Colby pond, Adirondack mountains. 
Potamogeton Oakesianus, Lobbins. In the slow-flowing streams 
of the Adirondack region there is a slender Potamogeton which I refer 
to this species. JI have not seen it with mature fruit, its fruiting sea- 
son being very late, if indeed it matures its fruit at all. Its stem is 
not at all or only sparingly branched, its floating leaves are very nar- 
row or even lanceolate, and borne on slender petioles many times 
longer than the leayes, and the phyllodia or submerged Jeaves are ex- 
ceedingly long and slender, even capillary. 
‘i Potamogeton Claytonii, Twckm. A dwarf form resembling P. lucens 
Vv. minor, grows on mud in an exsiccated. pond-hole in the Stony Clove. 
It fruits freely but seldom has any phyllodia. ‘The stems are but a . 
few inches long and yet they are sometimes much branched. Its ap- 
pearance is very unlike the ordinary floating forms of the species. 
Potamogeton gramineus v. graminifolius, 47. Stony ponds, Adiron- 
dack mountains. It is sometimes destitute of floating leaves. The 
var. heterophyllus was collected in Raquette river. This also occurs 
without floating leaves, as at Westport, and yet fruiting freely. 
Potamogeton amplifolius, Zuckm. One of the most common pond- 
weeds in the Adirondack waters. It is a large, fine-appearing plant 
and fruits abundantly. Like other species it is more slender in waters 
with a strong current than in still waters. In such localities the 
leaves are more diseant and even the spikes elongated and more loosely 
flowered. In still water the spikes are very compact and the flowers 
are regularly arranged in six ranks. 
Potamogeton lucens, Z. Raquette river. The var minor in the 
Normanskill near Albany. 
Potamogeton pusillus, Z, Both var, vulgaris and var. tenuissimus 
