130 BOTANY. 



puberulent; stems ascending or erect, 4-18' long ; petioles wholly dilated 

 and sheathing ; leaves ternate-pinnately decompound, the ultimate segments 

 very numerous, linear, somewhat obtuse ; cauline leaves few, (1-2,) near the 

 base ; umbels terminal, with 5-10 very unequal rays, 1-5' long ; involucre 

 none ; involucels 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, 1-24" broad, narrowing upward, several times 

 longer than the pedicels, with a narrow and rather thick lateral margin, the 

 dorsal ribs filiform ; vittse 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. Wahsatch Mountains, 

 Utah; 5-6,500 feet altitude ; May, June. (467.) 



Peucedanxjm macrocaepum, 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 margin more than half the width of the seed ; ribs 

 filiform ; vittaa solitary, 2-4 on the commissure ; seed thin and flattened. — 

 Specimens from a single locality have yellow flowers and glabrous involucels, 

 but are otherwise apparently the same. "Honiboi" of the Pah-Utes. 

 Oregon and California to the Saskatchewan. Trinity and West Humboldt 

 Mountains, Nevada ; 6,000 feet altitude ; May, June. (468.) 



Peucedanum (?) NUDicAULE, Nutt. (?) Caulescent or sometimes 

 scarcely so, minutely pruinose-pubescent, 3-15' high ; leafy only at base ; 

 leaves bipinnate or ternate-bipinnate, the segments incisely lobed with 

 usually rather broad and subacute divisions ; umbel somewhat capitate in 

 flower, with 8-12 rays ; involucre none ; involucels unilateral, of 6-10 mem- 

 branously 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; vittee 3 in the intervals, 6 upon the commissure, conspicuous; seed 

 flattened.— This is 212 Hall & Harbour, collected also by Parry in Colorado. 



