25 
This form is also remarkable for its tuberous rootstocks, which 
are very abundant. 
I have collected this not only in Apponaug pond, but also in 
Waushakum pond, Ashland, Mass., and Lake Quinsigamond, 
Worcester, Mass. It occurs also in Lake Saltonstall, near New 
Haven, Conn. (Prof. O. D. Allen.) 
Forma MINIMUS, Morong. 
A very rare form, with long, almost capillary stems and inter- 
nodes 3 to 4 inches in length. Submerged leaves thickly clus- 
tered on short, lateral branches, 12 to І inch long and scarcely Y line 
wide, acuminate, I-nerved, some of them with the nerve obscured. 
Floating leaves 1 to 1% inches long and 3 to 9 lines wide, lance- 
olate, oval or ovate, usually clustered at the summit of the stem. 
This form I collected in Spot Pond, Stoneham, Mass., and it has 
also been detected in Lake Winnepesaukee, N. H., by W. F. 
Flint. The minute submerged leaves, clustered on short, lateral 
branches are quite striking. 
Forma maxımus Morong. 
Var. maximus, Morong, without description, Bull. Torr. Bot. Club, 
xiii. 155. | 
АП the parts greatly elongated. Stems sometimes IO to 12 
feet in length. Floating leaves often lanceolate and sharply 
pointed, 3 to 4 inches long and 6 to 14 lines wide. Submerged 
leaves 2 to 6% inches long and 3 to 8 lines wide, 5 to 9 nerved. 
Specimens collected by Prof. O. D. Allen, in Lake Whitney, 
Conn., have large, oval, floating leaves with from 29 to 31 nerves, 
and submerged leaves with 13 nerves. Peduncles 2 to 4 inches 
long, usually much thickened upwards, often at right angles to the 
stem, a peculiarity which I have observed in specimens from other 
localities also. This form greatly resembles one sent by Dr. 
Tiselius from Sweden, and named by him var. fuctuans. It com- 
monly occurs in swiftly flowing water, to which fact the elonga- 
tion of the parts is doubtless largely owing. 
Charles river, Mass., Saranac river, Adirondacks, N. Y., and 
Connecticut river, Deerfield, Mass. (Morong); Lake Vermilion, 
Minn. (L. H. Bailey); Pine Plains, N. Y. (Hoysradt); Delaware 
river, N. J. (Porter); flowing water, Busic river, Anticosti (Ma- 
coun). 
