246 NORTH AMERICAN SPECIES OF JUNCUS. 
4. In the great interior valley from Michigan to the Rio Grande: J. brachycarpus, and, with 
more extensive limits, one of the forms of J. nodosus (the var. megacephalus). 
5. Northward: J. filiformis and the northern varieties of J. nodosus and Canadensis ; 
northeastward : J. articulatus, Greenii, and, very locally, /. Smithai ; northwestward, extending [438] 
to the Rocky Mountains: J. alpinus and Vaseyz. 
6. Southward, mostly southeastward and to the Gulf, some of the species extending south- 
westwardly to Arkansas and Texas: J. setaceus, dichotomus, repens, Elliottii, scirpoides, caudatus, and 
asper, the latter only in the most northeastern limits of the region; J. seirpoides as far north and 
southwest as any of these species; southwestward : J. leptocaulis and a form of J. nodosus (the var. 
Texanus). 
7. On the Pacific slope, in the low country: J. compressus, Breweri, patens, arcticus (var.), 
Bolanderi, and oxymeris. The following extend from the coast to the mountains: J. Mertensianus, 
wiphiotdes, and phceocephalus, the two former spreading eastward to and beyond the Rocky 
Mountains. 
8. Maritime species, — northeast : J. Balticus, Gerardi, and militaris, the two former extending 
inland along the lakes, the two latter also southward; southeast: J. Remerianus; Pacific coast : 
J. acutus, procerus, Balticus, subspecies, and falcatus. 
9. Alpine and arctic species, — eastern: J. arcticus, trifidus, and stygius; western: J. Drum- 
mondii, Hallii, Parryi, triglumis, castaneus, longistylis, chlorocephalus, saginoides, — the two last only 
on the Californian Alps. J. biglwmis has been found thus far solely in the highest arctic regions of 
our continent. 
The following table exhibits at a glance the geographical distribution of our species : — 
Peculiar to Common with Total. 
our country, other countries. 
Bi Winelw onatity oO a ee es ae 1 3 
2. Whole country except Pacific region . . . . . 1 es 2 =e 2 
3. Whole country except Pacific region and Mississippi valley 2 2 
Se TORENT VRE oe ee nec SNE ee ae eet ce ee 1 1 
Bie oe eS Soe ee 3 3 6 
es OUR RE i os 5 se Oe) eo 8 are 8 
Wi Pe a a a ee 7 1 8 
Siete ea oS eee 3 4 7 
0. Alpine and arctic specieh. 8. ee ee 6 6 12 
TOM 6 eC ae ee ee We a eee 33 17 50 
NOTES ON THE NORTH AMERICAN SPECIES OF JUNCUS. 
1. J. acutvs, Linn., has been found by Prof. Brewer near San Luis Obispo, California, “ where it is abundant in 
a stream in the hills between the town and the landing of the same name, a few miles from the sea, growing 
in dense tufts.” His specimens were collected in April in full bloom ; the stem is nearly four feet high, the pan- [489] 
icle six inches long; the flowers, absolutely identical with European specimens, are easily recognized by their 
broadly margined sepals, the inner ones being deeply emarginate, and by their thick and short subulate stigmas. I 
have also seen specimens said to have come from the coast of New Jersey ; Baldwin collected it on the La Plata in 
’ South America, and Chamisso and Gaudichaud brought it from the same regions. J. macrocarpus, Nees, from the Cape 
of Good Hope, is the same species. 
2. J. Rawertanvs, Scheele, Linnea, 22, 348; Walp. Ann. 3, 655: rhizomate longe repente ; foliis caules (2-3 
pedales) robustos rigidos teretes equantibus ; spatha paniculam supra-decompositam patulo-effusam longe superante ; 
glomerulis 3-5-floris ; sepalis ovato-lanceolatis 5-nerviis exterioribus acutatis, interioribus brevioribns obtusis sepe 
