Peucepanum. UMBELLIP^ER;E. C27 



— Root tuberous, large and somewhat fusiform. Stem of the fertile plant 1-2 

 feet high; of the sterile one very short. (Segments of the leaves 1-3 inches 

 long, petiohikile, 1-3 lines wide. Peduncles usually a foot or more in lengtii. 

 Rays of the umbel 8-12. Flowers polygamous, or dia>eious. Fruit about 

 5 lines long, somewhat attenuated upward in 0. ; the ribs promiuiui and 

 pale : vittie dark brown. — The roots of this and tlie preceding species, after 

 having been fermented by heat, are used as food by the aborigines. 



5. P. /rtfi7if«/«m (Nutt. mss.) : "glabrous; stem low and slender, mostly 

 simple; leaves biternalely divided ; segments linear and rather long, obtuse; 

 sheaths small ; involnere and involucel? none; fruit oblong-elliptical ; inter- 

 vals with single vittiB ; commissure with 2 vittjc. 



" Blue Mountains of Oregon, — Petioles about 4 inches long. Segments of 

 the leaves all ternatcly divided, narrowed towards the base. Rays of the 

 umbel 12-14. Fruit about as long as the jjcdicels, the border rather wide. 

 Flowers not seen." NuUaLl. — We have not seen this species. 



* * * Involucre none : involucel unilateral, palmately cleft : flowers white : Iraves 

 tripinnately divided. 



—/—€•. P. nudicaulc (Nutt. mss.) : nearly stemless; glabrous and somewhat 

 'glaucous; rachis of the leaves narrowly winged ; segments oblong, ])innati- 

 fid ; the lobes lanceolate and acute ; involucel 7-9-parted, membranaceous : 

 fruit ovate; the winged margin about half as wide as the disk; intervals 

 with single vitttc ; commissure with 4 vitta). — Smyrnium nudicaule, Pursh, 

 fl. I. ]). 196. Ferula nudicaulis, NuU..' i^cn. 1. p. 182, not ol' Sj)reng. 

 F. Nuttallii, DC. prodr. 4. p. 174 ; Hook. 'jl. Bor.-Am. l.p. 268. 



High plains, on the upper part of the Missouri, Arkansas, and the Rocky 

 Mountains, Bradbury, Nuttall ! On the Oregon, Lewis, Douglas. 



* * * * Involucre none : imolucels unilateral, palmately cleft, or of 6-9 oblong 

 or obovate leaflets : flowers yellow : calyx-teeth minute : leaves ternatcly and 

 pinnately decompound. 



7. P. fceniculaceum {Nutt. \ mss.): nearly stemless and minutely pubes- 

 cent; ultimate segments of the leaves narrowly linear, short ; involucel 5-7- 

 cleft; fruit broadly ovate ; the winged border about half the breadth of the 

 disk ; ribs prominent ; vittaj 1-2 (rarely 3) in the intervals, 2-4 in the com- 

 missure. — Ferula freniculacea, Nult. I gen. 1. p. 183 ,* DC. prodr. 4.^.174. 

 Pastinaca fu-niculacea, Sprcng. in Schult. syst. 6. p. 587. 



0. daucifolium: rays of tlie llowering umbel and involucels hoary-tomen- 

 tose. — P. daucifolium. Null. I mss. Ferula fcrniculacea. Hook. ! fi. Bor.- 

 Am. 1. p. 268, partly, (sp. from Saskatchawan !) 



y. tomeutose-pubescent, nearly stemless ; segments of the leaves linear- 

 oblong, much crowded ; fruit (inmiature) and involucels pubescent. 



Upper part of the Missouri and Arkansas, Nuttall! Sandstone hills on the 

 prairies of Grand River, Dr. James! fi. on the Platte, Nuttall ! Saskatclia- 

 wan, Drummond ! April-May. — Root fusiform. Petioles large and sheath- 

 ing at die base. Leaves finely dissected ; die ultimate segments 1-3 lines 

 long and almost capillary. Peduncle 8-12 inches long. Princijial rays of 

 theumbel l-2i inches long ; several short abortive ones. Involucel nearly 

 as long as die flow^ering umbel, at first densely tomentose, but at length some- 

 what glabrous ; the lobes oblong-lanceolate, acute. Flowers polygamous. 

 Calyx distinctly 5-toothed. • Petals oval ; the point cuspidate. Fruit about 

 2 lines in length : dorsal intervals with seldom more than 2 vittae ; die lateral 

 ones with 2 or 3. 



8. P. macrocarpum (Nutt. ! mss.) : minutely pubescent ; stem short ; ul- 



