COULTER AND ROSE—NORTH AMERICAN UMBELLIFERAE. 211 
cels slender, 10 to 16 mm. long; flowers white; fruit linear-oblong, 
glabrous, 6 to 8 mm. long, 2 to 3 mm. broad, with the narrow wings 
less than half as broad as body; oil tubes several in the intervals. 
Type locality, on wet clay **on an isolated rock in the Coeur d’ Alene 
Mountains,” Idaho; collected by Geyer, no. 325, April. 
Kastern Washington and Idaho. 
Specimens examined : 
WasHINGTON: Near Spangle, Spokane County, Suksdorf 1204, May, 1889; G. R. 
Vasey in 1889; Sandberg & Leiberg 131, in 1893; Wawawai, Whitman County, 
Piper 1567, May 12, 1894; same station, dimer 98, May, 1897. 
Ipano: Along Hatwai Creek, Nez Perces County, Sandberg 82, April 30, 1892; 
about Lewiston, Nez Perces County, altitude 450 to 600 meters, A. A. & EF. 
Gertrude Heller 3086, May 7, 1896, 
6. Lomatium piperi (. & R., sp. nov. 
Dwarf acaulescent, from a deep-seated solitary rounded tuber with 
frequent clusters of fine rootlets over its surface; leaves 2 to 3-ternate; 
leaflets linear, usually entire, 1 to 2 cm. long: umbel 1 to 8-rayed, 
with involucels of few small linear bractlets or none; rays 2.5 to 5 
em. long; flowers white, the ovary with an enlarged disk projecting 
beyond the top: fruit almost sessile, oblong-elliptical, glabrous, 4 to 8 
mm. long, 3 to 4 mm. broad, with wings half as broad as body; oil 
tubes small, 2 to 4 in the intervals, + to 6 on the commissural side; 
seed face plane. 
Type locality, Ellensburg, Spokane County, Wash.; collected by 
G. R. Vasey; May, 1889; type in U.S. Nat. Herb. 
From the mountains of northern California to Washington. 
Specimens examined: 
Cauirornia: ‘Northern Sierra Mountains,’’ Lemmon, April-May, 1879. 
OREGON: Prairies, eastern Oregon, Howell, April, 1880; Lookout Mountains 
(Sierra Blue Mountains), Crook County, Cusick 1687, July 1, 1897. 
Wasnincton: Hillsides, Columbia River, Klickitat County, Suksdorf, March- 
April, 1881; type specimens as cited under type locality; Whited 60, May 6, 
1896. 
DL. piperi has heretofore passed as Peucedanum farinosum, but as Mr. C. V. Piper 
has pointed out to us it must be distinct. It is a great pleasure to have this oppor- 
tunity of associating Mr. Piper’s name with a group of plants of his own State in 
which he has done so much valuable work. 
7. Lomatium watsoni C. & R. 
Peucedanum watsoni C, & R. Bot. Gaz. 13: 200. 1888. 
Acaulescent, 5 to 7.5 em. high, more or less puberulent, with a short 
subterranean stem from a deep-seated oblong tuber (with clusters of 
rootlets over its surface) with or without a thick elongated root below; 
leaves bipinnate, the ultimate segments short and linear-oblong; umbel 
unequally 1 to 5-rayed, with involucels of bractlets united nearly to 
the top; rays from almost wanting to 2.5 em. long; flowers yellow; 
fruit sessile or nearly so, ovate, puberulent, 6 mim. long, 3 mm. broad, 
