COULTER AND ROSE—-NORTH AMERICAN UMBELLIFERAE. 2138 
MonTana: Hellgate Canyon, Watson 161, August 8, 1880; head waters of Jocko 
River, Canby 151, July 15, 1883; Spanish Basin (Madison Range) and 
Bridger Mountains, altitude 1,800 to 2,400 meters, Flodman 692, 693, 694, 
July 10-28, 1896; Bridger Mountains, Rydberg 4623, June 18, 1897; Forks of 
Madison, Rydberg 4617, July 26, 1897. 
Wyomine: Yellowstone Park, Tireedy 851, July, 1885; near Crandall Creek, 
northwestern Wyoming, Rose 274, August 29-30, 1893; Druid Peak, Yellow- 
stone Park, A. & EF. Nelson 5782, July 12, 1899. 
9. Lomatium leptocarpum (Nutt.) C. & R. 
Peucedanum leptocarpum Nutt. in Torr. & Gray, Fl. 1: 626, 1840. 
Peucedanum triternatum leptocarpum Torr. & Gray, |. c. 
Peucedanum ambiquum leptocarpum C. & R. Rev. N. Am. Umbell. 59. 1888. 
Acaulescent, becoming 3 dm. high, from deep-seated tuberous roots, 
glabrous; leaves ternate then pinnate, the ultimate segments linear 
and usually much elongated; umbels with few very unequal rays, and 
involucels of small linear bractlets; rays from almost wanting to 7.5 
em. long; flowers yellow; fruit nearly sessile, forming a dense cluster, 
linear, 9 to 10 mm. lone, 2 mm. broad, with very narrow wings; oil 
tubes solitary in the intervals. 
Type locality, ‘plains of the Oregon [Columbia] near the confluence 
of the Wahlamet;” collected by Wutta//, in July: type in Herb, 
Philad. Acad. : 
From Oregon and northeastern California to Colorado. 
Specimens examined: 
CairorNiA: Big Valley, Lassen County, Baker & Nutting, June 20, 1894. 
OrEGON: Type specimens as cited under type locality; Geyer 557; The Dalles, 
Wasco County, Nevius, in 1871; Union County, Cusick 359, May, 1883; 
Antelope, Wasco County, [Howell 417, 557, May 10, 1885; near Grizzly 
Butte, Crook County, altitude 1,040 meters, Leberg 299, June 19, 1894; 
Elgin, WV. Bailey 59, May 27, 1896. 
Ipano: Indian Valley, Jones, July 15, 1899. 
Uran: Salt Lake City, altitude 1,500 meters, Watson 467, May, 1869. 
CoLorabo: Steamboat Springs, Alice Hastiood, July 10, 1891. 
10. Lomatium circumdatum (Watson) C. & R. 
Peucedanum circumdatum Watson, Proce. Am. Acad. 22: 474. 1887, 
Caulescent, with few branches, from a deep-seated constricted tuber, 
glabrous or puberulent, 3 dm. or less high; leaves ternate then once 
or twice pinnate; ultimate segments linear, 2 to 12 mm. long; stem 
leaves with petioles broadly dilated at base; umbel unequally 6 to 12- 
‘ayed, with involucels of conspicuous broadly oblanceolate (often 
united) bractlets, becoming scarious; rays 1 to 8.5 cm. long; pedicels 
2 to 4 mm. long; flowers yellow; fruit oblong-elliptical, glabrous, 
6 to 8 mm. long. 3 mm. broad, with narrow wings, and very prominent 
dorsal and intermediate ribs; oil tubes solitary, large, tilling the inter- 
vals, 4 on the commissural side; seed face concave, with a prominent 
central ridge. 
Type locality, ‘ton hillsides in the Wallowa region of eastern 
