65 
2. PHYLLOSPADIX SCOULERI, Hook. Fl. Bor. Am. ii. 171, t. 186 
(before 1840). 
Stems very short, an inch or two in height, bearing solitary 
spathes. Leaves 3-6 feet long, 1-2 lines wide, 3 nerved, with 
many fine striae between the nerves. Spadix appendages on both 
kinds of flowers elliptical, % inch long. Fruit broadly flattened, 
the lobes half as long as the body. In general appearance and 
inflorescense this is similar to the preceding species, but may be 
distinguished by its broader leaves, and especially by its short 
stems and single spathes. 
Barclay Sound, Vancouver's Island (Macoun); Tilamook Head, 
Oregon (Henderson); Dundas Island, Columbia River, Oregon 
(Scouler). Russian River, Siberia (Ruprecht). (Plates LXXIII 
and LXXIV.) 
Since the sheets of this monograph went to press, I have re- 
ceived specimens of Potamogeton foliosus var. Niagarensis, collected 
by Mr. C. F. Wheeler in Cedar River, on the grounds of the Agri- 
cultural College in Michigan 
Also P. rutilus, Wolfg., collected by the same gentleman in the 
Detroit River, July 19, 1892. 
Of the following plates a part were prepared by the author for 
another work, and are here used by permission. 
