36 Report of the State Botanist. 



Typha angustifolia L. 



Professor Dudley has described a variety of Typha latifolia^ 

 under the name elongata. In it both the leaves and spikes are 

 elongated, the former being " 2 to 3^ meters " long, the latter 

 " often 30 centimeters." 



A similar variety of Typha angustifolia is found along the 

 shore of Cayuga lake, between the railroad bridge and the outlet. 

 In it the fertile part of the spike is eight to ten inches long. It 

 may be designated var. longispicata, though I suspect it is 

 merely a luxuriant development of the common form. 



Pontederia cordata L. 



Specimens of this plant were collected in Highland lake in 

 which the fibrous roots had a beautiful purple color. Var. 

 angustifolia Torr. occurs here ; also in Stissing pond, Dutchess 

 county. 



Potamogeton Nuttallii Ch. <& Sch. 



A form of this species was collected in the upper waters of the 

 Oswegatchie river near Sternbergs, in which the stem branches 

 freely, and the leaves are unusually narrow. It is here character- 

 ized as var. ramosus. Stem slender, branched; floating leaves 

 with blades 1.5 to 2.5 in. long, 3 to 6 lines broad; submerged 

 leaves 1 to 2 lines broad. The name P. Pennsylvanicus Cham, 

 is applied to this species in the Manual. I have followed Dr. 

 Morong in nomenclature. 



Potamogeton amplifolius Tuckm. 

 This is one of our most common species. It occurs in all parts 

 of the State, in still or flowing, shallow or deep, soft or hard, 

 warm or cold water. In deep water it is destitute of floating 

 leaves. In Thompson's lake it skirts the whole western and a 

 part of the eastern shore in water four to six or eirht feet deep, 

 and is always destitute of floating leaves. The foliige generally 

 has a rufous tint. It seems to avoid more shallow water. The 

 same form occurs in "Warner's lake and behaves the same way. 



Potamogeton lonchites Tuckm. 

 Specimens were collected in and near the outlet of Seneca lake 

 in which, though in flower, the floating leaves were wanting or 



