1 30 BOTA^N^Y. 
puberuleiit ; stems ascending or erect, 4-18' long ; petioles wholly dilated 
and slieathing ; leaves ternate-pinnately decomponnd, the idtimate segments 
very numerous, linear, somewhat ofetuse ; cauline leaves few, (1-2,) near the 
base ; umbels terminal, with 5-10 very unequal rays, 1-5' long ; involucre 
none ; involncels unilateral, of 1-8 linear-subulate bracts ; calyx-teeth obso- 
lete ; petals yellow or white, with a comparatively short and obtuse point ; 
fruit oblong, 4-6" long, l-2i" broad, narrowing upward, several times 
longer than the pedicels, with a narrow and rather thick lateral margin, the 
dorsal ribs filiform ; vittje very obscure ; seed thin and flattened. — Sometimes 
an interrupted or anastomosing line may be detected in the intervals and 
similar marginal ones on the commissure. Resembling P. caruifolium, but 
with different involucels and much narrower fruit. Wahsatcb Mountains, 
Utah ; 5-6,500 feet altitude; May, June. (467.) 
Peucedanum mackocarpum, Nutt. Pubescent; stems short, (6-10',) 
several from a long caudex, which terminates below in a fusiform tuber ; 
leaves mostly cauline but near the base, with dilated petioles, bipinnate, the 
segments pinnately incised, ultimate divisions acute, ovate or shortly linear ; 
umbels 12-18-rayed ; involucre none ; involucels unilateral, of about 10 linear- 
lanceolate acuminate segments, equaling the flowers; petals white, (or 
yellow ;) calyx-teeth small ; fruit nearly glabrous, narrowly elliptical, 5-6" 
long and 1 " broad, the nuirgin more than half the width of the seed ; ribs 
filiform ; vittffi solitary, 2-4 on the commissure ; seed thin and flattened. — 
Specimens from a single locality have yellow flowers and glabrous involucels, 
but arc otherwise apparently the same. "Honiboi" of the Pah-Utes. 
Oregon and California to the Saskatchewan. Trinity and West Humboldt 
Mountains, Nevada; 5,000 feet altitude; May, June. (468.) 
Peucedanum (?) NUDicAULE, Kutt. (?) Caulescent or sometimes 
scarcely so, minutely pruinose-pubescent, 3-15' high ; leafy only at base ; 
leaves Inpinnate or ternate-bipinnate, the segments incisely lobed with 
usually rather broad and subacute divisions ; umbel somewhat capitate in 
flow er, with 8-12 raj s ; involucre none ; involucels unilateral, of 6—10 mem- 
brauously margined, more or less united bracts ; petals white, with attenuated 
apex and quasi-obcordate ; calyx-teeth short ; fruit pubescent, broadly oval, 
3-4 long and 3 broad, the thickish wing more than half as wide as the 
seed; vitt!i3 3 in the intervals, 6 upon the commissure, conspicuous; seed 
flattened. — This is 212 Hall & Harbour, collected also by Parry in Colorado. 
