56 
are greatly elongated, sometimes as much as 12 inches or even 
more; pedicels 4-6 in a cluster, 17-177 inches in length. Drupes 
with a dark hard shell, about 1 line long, ovoid, often oblique or 
gibbous at base, pointed with the long style. The drupes vary a 
good deal in shape, usually simply conical with a short gibbous 
swelling at the base, sometimes with a strong spur-like projection 
and a curved outline, as in the form known in Europe as А. ros- 
tellata, Koch, which does not, however, differ otherwise from the 
type. Specimens with fruit of this shape are sent from Oregon 
by Mr. Howell. Forms with fruit nearly destitute of peduncles 
and pedicels, and broad strongly marked sheaths, similar in these 
respects to А. brachypus, Gay, occur at Wood's Holl, Mass., and 
at other places along the Atlantic coast. (Plate EXI) 
2. RUPPIA OCCIDENTALIS, S. Watson, Proc. Am. Acad. Sept. 25, 
1890, p. 138. 
К. lacustris, Macoun, Cat. Can. РІ. Pt. 5. 372, Nov. 1890. 
A stoutish-stemmed plant 1-2 feet high, the branches forking 
in fan shape. Leaves 3-8 inches long, with large sheaths 2-1 14 
inches in length. Branches and leaves often thickly clustered at 
the nodes, the sheaths overlapping each other. Drupes large, 
1142 lines long, of a thick pear shape, on pedicels 34-1 inch long. 
Prof. Macoun states that the peduncles are bright red when fresh. 
Coll. by Macoun ina saline pond at Kamloops, B. Columbia. 
Also collected by H. J. Webber in a saline region at Alliance, 
Box Butte Co., Nebraska. Mr. Webber writes that he found pe- 
duncles nearly 2 feet in length. (Plate LXIII.) 
6. ZANNICHELLIA, L. Sp. Pl. 969 (1753). 
Stems, flowers and leaf buds all at first enclosed in a 
hyaline envelope, a sort of spathe, corresponding to the stipule of 
Potamegoton, rising from a node. Staminate and pistillate flowers 
in the same axil ; the stamen solitary, 2-celled, on a short pedicel- 
like filament ; pistillate 2-5 or more ina special envelope of their 
own. The stamen is said to be 4-celled occasionally, but I never 
could find more than 2 cells. Ovary a flask-shaped body, stipulate 
at base, tapering into a short style, with a broad, hyaline stigma 
which is somewhat cup-shaped, and has irregular, angled or den- 
tate edges. Sometimes the whole cluster of flowers is on a stipe 
