43 
biglandular at base and bright green in color. Stipules acute, 6- 
10 lines long, often longer than the internodes and hiding the 
bases of the leaves above, persistent, becoming white and fibrous 
with age. Peduncles 6-18 lines long, scarcely thicker than the 
stems. Spikes 3-5 lines long, usually continuous, but sometimes 
interrupted. Fruit obliquely obovate, 34-1 line long by %»-% 
line wide, keels obscure, or the back showing only 2 small grooves; 
face obtusely angled towards the base; apex of drupe sloping into 
a short, facial, recurved style; embryo circle not complete, the apex 
pointing a little inside of the basal end. Resembling pusillus, 
especially those occasional forms of that species which have acute 
and somewhat revolute leaves; but its strict, almost or quite erect 
leaves with long very sharp acuminate points, prominent nerves, 
and long, persistent, acute stipules well distinguish it. 
A rare species in this country. Anticosti, at the mouth of the 
Nipigon River, near Red Rock, Lake Superior and James Bay, 
Canada (Macoun). Found by Prof. L. H. Bailey in flower July 24, 
1886, in Vermilion Lake, Minn., (no. B. 394). (Plate L.) 
27, ae. Vaseyı, Robbins, in A. Gray. Man. Ed. 5, 485 
(186 
Sd floating leaves on the fertile stems only. Very deli- 
cate, stems filiform, widely branching from below and with many 
short lateral branches above, 1-114 feet in height. The emersed 
fertile forms in shallow water, near shore, and the more common 
sterile submerged forms in water from 6 to 8 feet in depth. Float- 
ing leaves coriaceous, in 1-4 opposite pairs at the top of the stem, 
the blades obovate, 4-5 lines long by 2-3 lines wide, with 5-9 
nerves deeply impressed beneath, sloping at base into petioles 3-4 
lines long. Submerged leaves almost capillary, nerveless or 1- 
nerved, tapering to the fineness of a hair, 1-1 14 inches in length. 
The leaves frequently biglandularat base. Stipules white, delicate, 
many nerved, acute or obtuse, 2-3 lines long. Peduncles 3-6 
inches long, spreading or recurved, thickening in fruit. Spikes 
2-3 lines long, often interrupted. Fruit roundish-obovate, about I 
line long and nearly as broad, 3-keeled, middle keel rounded ; face 
arched above and incurved below, tipped with a rather long 
straight or recurved style; sides even or impressed with a shallow 
