COULTER AND ROSE—-NORTH AMERICAN UMBELLIFERAE. 117 
In swamps and streams, Ontario to Texas, westward to British 
Columbia and California, and extending into Mexico. 
Specimens examined: 
Inuinors: F. Peck. 
Mrixnesota: Fort Snelling, Mearns, September 15, 1891. 
Sourn Daxora: Black Hills, near Fort Meade, Forwood 141, August 5, 1887; Big 
Stone, Grant County, Williams, August 23, 1892; Black Hills, Hot Springs, 
Rydberg 722, August 10, 1892. 
NesprasKa: Paddock, Clements 2802, July 29, 1893. 
Kansas: Reno County, Curleton 294, July 10, 1891; Rockport, Bartholomew, August 
3, 1891. 
Texas: Wright 1105, in 1851-52; Mer. Bound. Surv.; San Antonio, Havard. 
New Mexico: Silver City, Snow, August; White Mountains, Lincoln County, 
Wooton 256, July 31, 1897. 
Cotorapo: San Luis Valley, Wolf 732, September, 1873; near Denver, Lellerman 
217, August 20, 1884; near Fort Collins, Cowen, July-August, 1898 and 1895, 
Wyominc: Yellowstone Park, Forwood, August 3, 1881; Little Goose Creek, 
A, Nelson 2275, July 11, 1896; Badger, A. Nelson 2766, August 27, 1896. 
Montana: Great Falls, Williams 193, September 27, 1885, 
Uran: Near Glenwood, Ward 303, July 8, 1875; Rabbit. Valley, Ward 595, August 
17, 1875; Salt Lake City, Tracy 662, August 11, 1887; Provo, Jones 5618a, July 
11, 1894. 
Arizona: Santa Cruz River, Smart 373, in 1867; Palmer, in 1869; Bakers Butte, 
Toumey 189, July 19, 1892; Fort Apache, Shuttleworth, June 29. 
Nevapa: Humboldt Pass, Watson 444, September, 1868. 
Cauirornia: Near Fort Tejon, Nantus de Vesey 37, in 1857-58; same station, Roth- 
rock 262, August, 1875; near Los Angeles, Tracy 396, July 6, 1887; Inyo 
County, Coville & Funston 271, February 7, 1891. 
OrEGoN: Otis Creek, Malheur County, Leiberg 2341, June 20, 1896; Wallowa 
Valley, Cusick 2081, August 19, 1898. 
Wasuinaton: Coulee City and Wilbur, /enderson 2525, July 11, 1892. 
British CoLumMBIA: Kamloops, Macoun 20, June 17, 1889. 
35. PTILIMNIUM Raf. Am. Month. 4: 192. 1819. 
Discopleura DC. Coll. Mém. 5: 38. 1820. 
Calyx teeth small or somewhat prominent. Fruit flattened laterally, 
ovate or oblong, glabrous. Carpel with dorsal and intermediate ribs 
filiform to broad and obtuse; the laterals very 
thick and corky, closely contiguous to those 
of the other carpel, forming a dilated obtuse 
or acute corky band (except in 2. nuttallis); 
all subtended by strengthening cells. Stylo- 
podium conical and prominent, with very 
short to somewhat elongated styles. Oil 
tubes solitary in the intervals, 2 on the com- 
missural side. Seed nearly terete (somewhat sulcate beneath the oil 
tubes) or with flattish face. 
Smooth branching annuals, with finely dissected leaves (filiform or 
lanceolate divisions), involucre of foliaceous bracts, involucels of prom- 
inent or minute bractlets, and white flowers. 
Fig. 33.—Ptilimnium capil- 
laceum: a, * 8; b, x 10. 
