State Museum of Natural History. 55 



Mentha piperita, L. Along streams at Phoenicia a singular form 

 was observed. Its flowers were in axillary whorls or clusters as in M. 

 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 peculiar aspect to the plant that it seems worthy of a name 

 and might be called var. interrupta. 



Mentha Canadensis, L. 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 Virginicns, L. The small few-flowered form (L. pumilus, 

 Vahl.) with a thickened tuberous root occurs in the Adirondack re- 

 gion. 



Polygonum amphibium v. aguaticum, Willcl. 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. Each node of the submerged stem gives rise to a 

 cluster of rootlets. 



Sparganium simplex v. angustifolium, Gr. The terrestrial form, 

 with shorter, erect leaves, occurs at Edmonds ponds. 



Sparganium minimum, Bauh. Colby pond, Adirondack mountains. 



Potamogeton Oakesianus, Bobbins. In the slow-flowing streams 

 of the Adirondack region there is a slender Potamogeton which I refer 

 to this species. I 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 leaves, and the phyllodia or submerged leaves are ex- 

 ceedingly long and slender, even capillary. 



I'f Potamogeton Claytonii, Tuckm. A dwarf form resembling F. lucens 

 v. 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, Ft. Stony ponds, Adiron- 

 dack mountains. It is sometimes destitute of floating leaves. The 

 var. lieterophyllus was collected in Raquette river. This also occurs 

 without floating leaves, as at Westport, and yet fruiting freely. 



Potamogeton amplifolius, Tuckm. One of the most common pond- 

 Aveeds 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, L. Raquette river. The var minor in the 

 Normanskill near Albany. 



Potamogeton pusillus, L, Both var, vulgaris and var . tenuissimus 



