184 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
biternate; leaflets lanceolate, 7.5 to 10 cm. long, pinnately parted below, 
then confluent, finally toothed above, the larger segments more or less 
laciniately toothed (teeth and lobes not so sharp as in Z. vertiesllatum): 
umbel of numerous rays, with involucels of elongated (1 to 2 em.) 
linear bractlets; rays 5 cm. long; pedicels 10 to 12 mm. long; fruit 
(immature) with long slender conical stylopodium and prominent 
winged ribs; oil tubes 5 or 6 in the intervals, 6 to 8 on the commis- 
sural side. 
Type locality, ‘‘low grounds, near head waters of Jocko River, 
Montana;” collected by Canby, no. 155, July 16,1883; type in Herb. 
Canby (now in College of Pharmacy, New York City). 
In the mountains of northwestern Montana, northern Idaho, north- 
eastern Washington, and adjacent British Columbia. 
Specimens examined: 
Montana: Type specimens as cited under type locality. 
Tpano: Pend Oreille River, Lyall, in 1861; head of Bear Creek, Bitter Root 
Forest Reserve, altitude 2,000 meters, Leiberg 2978, September 1, 1897. 
Wasnrnaron: “From Fort Coville to Rocky Mountains,’’ yall, in 1861 (this 
may be an Idaho station; the label also cites ‘‘ Galton Mountains, altitude 
5,000 feet ’”). 
Brirish CotumBra: Donald, Columbia Valley, Macoun, July 13, 1885. 
8. Ligusticum leibergi C. & R., sp. nov. Pate IY. 
Glabrous, except the slightly roughish inflorescence; stem tall, 
somewhat leafy, usually with verticil of 8 to 7 peduncles surrounding 
the stouter and larger central one; leaves large, twice ternate, then 
pinnate; segments lanceolate, acuminate, laciniately cleft into narrow 
sharp-pointed and sometimes toothed lobes; lateral peduncles 1 to 3 
dm. long (the umbels often sterile), the central one 2 to 4 dm, long; 
umbel equally many-rayed, with no involucels (rarely a bractlet or 
two); rays 2.5 to 5 em, long; pedicels 8 to 12 mm. long; fruit oblong, 
4to 5 mm. long, with thin narrow wings; stylopodium conical. 
Type locality, Traille River Basin, Kootenai County, Idaho; col- 
lected by Leberg, no. 614, June-August, 1891; type in U.S. Nat. 
Herb. 
Idaho and eastern Washington. 
Specimens examined: 
Ipano: Traille River Basin, Kootenai County, Leiberg 614, June-August, 1891; 
Lake Cour d’Alene, Kootenai County, Sandberg 535, July 2, 1892; St. 
Maries, Kootenai County, THenderson 2663, 2664, August 3, 1894; Desmet, 
Kootenai County, altitude 850 meters, and Sohans Pass, altitude 1,650 
meters, Letherg 9, 429, June-August, 1895; Priest River Range, altitude 
1,500 meters, Letherg 2727, July 17, 1897; Lake Coeur d’ Alene, Henderson 
4607, August 8, 1898; Payette Lake, Jones, July 26, 1899. 
Wasuinaton: G. R. Vasey, August, 1889; Rock Creek (near Mica Peak), Spo- 
kane County, Suksdorf 1199, June-July, 1889; high ridges of the Blue 
Mountains, Wallawalla County, Piper 2342, July 15, 1896. 
EXPLANATION OF PLATE TV.—Fig. a, dorsal view of carpel; b, cross section of carpel. 
