e 
COULTER AND ROSE—NORTH AMERICAN UMBELLIFERAE. 215 
Type locality, mountain ridges in Yellowstone National Park; col- 
lected by Rose, no. 479, August 19, 1893; type in U. 5. Nat. Herb. 
On high ridges, from the mountains of eastern Oregon to Wyoming 
and western Dakotas. 
Specimens examined: 
Orecon: Higher Wallowa Mountains, Cusick 20950, August 25, 1898. 
Ipano: Dry basaltic hillsides, Lewiston, Nez Perces County, Piper 2019, May 
11, 1895. 
Monrana: Altitude 1,800 to 2,400 meters, Tireedy, June, 1888; Grafton, Willams 
149, June 2, 1892; near Red Lodge, Rose 58, July 29, 1893; Little Belt Moun- 
tains, near the Pass, altitude 2,100 meters, //odman 696, August, 1896; 
Bridger Mountains, Rydberg 4620, 4624, 4625a, 4627, June 14-15, 1897; same 
station, Chesnut & Jones 182, in 1900; near Bozeman, Chesnut & Jones 252, 233, 
in 1900. 
Wyomina: Yellowstone Park, Letlerman, August, 1885; same station, Tweedy, in 
1885; type specimens as cited under type locality; same station, Rose 198, 
August 14, 1893; northwestern Wyoming, Rose 591, 531, 552, August 26-31, 
1893; headwaters of Tongue River, Big Horn Mountains, Tweedy 57, July, 
1898. 
Nortu Daxora: Little Missouri River, Canby 152a, June 30, 1885. 
EXPLANATION OF PLATE IX.—Photograph of plant taken in the field, furnished by Victor K, 
Chesnut. 
This species has been confused chiefly with Z. cous, sometimes with 1. circumdatum, 
but differs from both in its foliage, rootstock, oil tubes, smaller fruit, etc., and has a 
much more eastern and high mountain range. 
13. Lomatium utriculatum (Nutt.) C. & R. 
Peucedanum utriculatum Nutt. in Torr. & Gray, Fl. 1: 628. 1840. 
Caulescent or sometimes nearly acaulescent, from cespitose to 8 dm, 
or more high, from a more or less thickened root, puberulent or gla- 
brous; petioles very broadly dilated: leaves ternately or pinnately 
decompound, with ultimate segments narrowly linear, 12 mm. or less 
long; umbel unequally 5 to 20-rayed, with involucels of much dilated 
mostly obovate often toothed petiolate bractlets; rays 5 cm. or less 
long; pedicels 4 to 10 mm. long; flowers yellow; fruit broadly ellip- 
ical, glabrous, 4 to 10 mm. long, 2 2 to 7 mm. broad, with wings nearly 
as broad as body, and prominent dorsal and interme ‘diate ribs: oil tubes 
large and solitary in the intervals, 4 to 6 on the commissural side, 
sometimes 2 or 3 very short accessory ones in the dorsal intery vals: 
seed face somewhat concave. 
Type locality, **rocky plains, particularly near the confluence of 
the Wahlamet and Oregon [Columbia] rivers,” Oregon: collected by 
Nuttall; type in Herb. Philad. Acad., duplicate in Herb. Gray. 
From southern California to British Columbia, 
Specimens examined: 
JALIFORNIA: Bigelow, in 1853-54; Fort Tejon, Nantus de Vesey 39, in 1857-58; 
Mount Diablo, Brewer 1128, May 20, 1862; Newcastle, Placer County, Bolander 
4578, April, 1865; near San Francisco, Ae//ogy, in 1866; same station, Kellogg 
& Harford 1154, 1155, in 1868-69; Sonoma County, Samuels 93; Bridges 131a; 
