COULTER AND ROSE—NORTH AMERICAN UMBELLIFERAE, 115 
Specimens examined: We cite but few of the very numerous specimens of this common 
and widely distributed species. 
NEWFOUNDLAND: Whitbourne, Robinson & Schrenk 212, October 15, 1894. 
Vermont: Barnet, Blanchard, August 25, 1884. 
Massacuusetts: West Quincy, Deane, June 28, 1890. 
Connecticut: Bridgeport, Hames, May 2, 1895. 
New York: Ithaca, Coville, August 20, 1885. 
PENNSYLVANIA: Harrisburg, Simal/, July 28, 1888. 
Disrricr or CoLtumBia: Great Falls of the Potomac, Pollard 107, April 27, 1895. 
Vircinta: Smyth County, Small, July 25, 1892, 
Onto: Lorain County, Ricksecker, August 10, 1894. 
Inpiana: Lake County, Umbach, August 20, 1898. 
Micuican: Near Agricultural College, Wheeler, in 1892. 
Wisconsin: Camp Douglas, Mearns, August 3, 1891. 
Missourt: Jackson County, Bush 252, August 22, 1896. 
Iowa: Fayette County, Fink 419, August, 1894. 
Minnesota: Fort Snelling, Mearns, September 1, 1891. 
Sourn Daxora: Brookings, Thornber, August 25, 1893. 
Nesraska: Grant County, Rydberg 1615, July 3, 1893. 
CoLorapo: San Luis Valley, Wolf 730, September, 1873. 
Wyomina: Yellowstone Park, Rydberg 4601, August 3, 1897; Laramie River, 
Albany County, Nelson 4281, September 15, 1897; Jacksons Lake, 4. & FE. 
Nelson 6551, August 18, 1899. 
Montana: Great Falls, Williams 374, July 22, 1886; East Gallatin, Mlodman 685, 
July 24, 1896. 
Ipano: Lake Pend Oreille, Leiberg 637, August, 1891; Mud Lake, Kootenai 
County, Sandberg 733, July 25, 1892. 
Uran: Ogden, Tracy 483, August 4, 1887; Marysvale, Jones 5974, September 1, 
1894. 
Nevapa: Ruby Valley, Watson 443, July, 1868. 
CALtForNIA: Siskiyou and Plumas counties, Brown, July-August, 1897. 
Orecon: Crook County, Leiberg 828, August 27, 1894; Drews Valley, Coville & 
Leiberg 157, August 2, 1896. 
WasHINGTON: Seattle, Piper, August, 1888. 
Brivis Cotumsta: Near Westminster, Macoun 302, August 28, 1893; near Lake 
Shawnigan, Vancouver Island, Cunby 94, August 16, 1897. 
GREAT SLAVE LAKE: Kennicott, in 1861-62. 
2. Sium carsonii Durand, in Gray’s Man. ed. 5. 196. 1867. 
Weak, 3 to 6 dm. high; leaflets 1 to 6 pairs, linear to lanceolate, 
sharply serrate, 2.5 to 5 em. long; when submersed or floating very 
thin, ovate to oblong, usually laciniate-toothed or dissected, the leaf 
sometimes reduced to the terminal leaflet; umbel fewer (10 to 15)- 
rayed; rays about 2.5 cm. long; pedicels 2 to 6 mm. long; fruit 
smaller, about 2mm. long, with less prominent ribs; oil tubes 2 to 4 
on the commissural side. 
Type locality, ‘‘ Pennsylvania, around the Pocono Mountain.” 
In streams, Maine to Pennsylvania; also in Minnesota. 
Specimens examined: 
Massacnusetts: Ashland, Wheeler, July, 1883. 
Connecticut: Trumbull, Hames, September 2, 1895, 
