448 TRANS. OF THE ACAD. OF SCIENCE. 
men I have seen a regularly tetramerous flower, with 8 
sepals, 8 stamens, and a 4-valved capsule. The leaves, which 
botanists do not seem to agree upon, appear to me fistulous, 
on the lower half so deeply grooved as almost to present two 
cavities, and upwards nearly terete or slightly flattened. Its 
alliance with oJ. Parryi is indeed very close. 
18. J. rrigtumis, Linn., on the Arctie coast and in the 
Rocky Mountains; in Colorado, Parry, 395, and Hall & 
Harbour, 557.—The seeds are of the same size as in the last 
species, but the appendages are much longer, though only in 
a specimen from Zermatt, Switzerland, I have seen them 
longer than the body of the seed. The roundish leaves are 
channelled below and flattened upwards, and really enclose 
two, or even three, tubular passages. 
19. J. sryerus, Linn. From North-western New York to 
Maine, New Brunswick, and Newfoundland. The seeds of 
this are the largest of any of our species; the body is 0.7-0.8, 
and the whole seed 1.5 lines long; the seed-coat, extr emely 
loose and easily removed, is scarcely striated. Mention has 
already been made of the short and recurved stigmas which 
are peculiar to this species; the filaments are 8 or 10 times 
as long as the oval anther, and much longer than the pistil ; 
the flowers, in the American specimens examined by me, are 
5 lines long, while in one from Norway I find them only 2 
lines long. A careful examination of the leaves proves them 
to be somewhat laterally compressed, with a very shallow 
groove on their lower part (generally a little on one side), and 
the interior cavity filled with very loose tissue which divides 
it into several (3-5) tubes. 
20. J. casTanEvs, Smith; the lower part of the terete, 
fistulous leaves is so deeply channelled that their base ap- 
pears equitant, and that in the herbarium the pressed leaves 
look like the averse and ensiform leaves of J. xiphioides; but 
their back is rounded and not in the least carinate, and the 
upper part of the leaf is only very superficially grooved. The 
flowers are usually over 8 lines long, and the stamens, as well 
as the elongated ovary with the short style, attain the length 
of the sepals ; ; linear, pointed anthers half as long as the fila- 
ments; stigmas exsert; oblong seeds, 0.4-0.5 line, or with the 
appendages, which considerably exceed the seed in length, 
1.6 lines or more, long, the longest of any of our species.— 
From the Rocky Mountains of Colorado to*the north-west 
coast, and eastward to the Hudson Bay regions and to New- 
foundland. 
21. J. Vasryi, n.sp.: cxspitosus; caulibus (1—-2-pedalibus) 
tenuibus rigidis striatis basi fusco-vaginatis ; foliis elongatis 
setaceis teretiusculis striatis versus basin suleatis faretis ; 
