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 J. Parry I is indeed very close. 



18. J. triglumis, Linn., on the Arctic 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. stygius, 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, extremely 

 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 

 8 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. castanets, 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 3 lines long, and the stamens, as well 

 as the elongated ovary Avith 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. Vaseyi, n.sp.: escspitosus; caulibus (1-2-pedalibus) 

 tenuibus rigidis striatis basi fusco-vaginatis; foliis elongatis 

 setaceis teretiusculis striatis versus basin sulcatis farctis ; 



