rENTANDRIA. BIGYXIA. 18S 



Species. 1. F. villosa. An active poison. 2. *fa-iii- 

 culacea. Stemle.ss and pubescent; leaves radical, sii;:,i'a-- 

 (lecompouncl, sul)biteriiritely j pseudo-]/i!ui;ite, praDary di- 

 visions decussating; at the base, seg'ments ratiicr short, 

 narrow-linear and subacute, ultimate lacini;c trlfid; invola- 

 cram none; involucell dimidiate, membranaceous, 5 to 7 

 iobed; flowers yellow. ' 



Descript. Root perennial, fusiform. Leaves partly 

 resembling- those of the Carrot (Daucus Carola) but more 

 numerously divided, and with shf)iter segments. Scape 

 about 1 foot hig-h, grooved and sm.cotii, bearing- a slng-le 

 umbell. Kxternal rays about 5, 10 to 15 lines long-, witii 

 several internal ones which are abortive. Involucell oa 

 one side, consisiing of a sing-le memln-anaceous Iobed lent' 

 nearly equal with the flowering- imibellet; peduncles short. 

 Calix minute, o-toothcd Petals yellow, equal, oval, invo- 

 lute. Styles long- ar.d persistent; sti.gmas capitate. Fruit 

 compressed, suborbiculate-eiliptic, surrounded with an 

 alated margin, on eitiier side slenderly striate; strire 5, 

 3 more conspicuous than the rest; commissure flat, naked, 

 the marginal membrane of the seed, not extending- over 

 the centre. I'he seeds somewhat res.emble those of Pus- 

 iinaca saliva and are nearly as large. 



Allied to Pastinaca. Hab. On the high plains of the 

 Missouri, commencing- about the confluence of the rivei- 

 Jauke. Flowering in April and May. This species pos- 

 sesses somewhat the scent of Fennel. 



3. nudicaule. Nearly stemless, smooth and somewhat 

 glaucous; leaves supradecompound, subbiternately pseu- 

 do-pinnate, pimary divisions decussating at the base,, 

 segments confluent, narrow-linear and acute; ultimate 

 lacinae irregularly subtrifid; involucrum none; involucell 

 dimidiate, membranaceous, 7 to 9-parted; flowers white. 



Simjriiium nudicaule. Pursh, Flor. Am, 1. p. 196. v. s. 

 under this name in Herb. Lanibert. 



Obs. Nearly alhed to the preceding, but producing a 

 minute stem or elevated caudex; in this also the segments 



I This word, which will be hereafter used, is analogous to 

 pinnate of others; though, slricdy speaking, iheie is not perhaps 

 a single instance of this kind of leaf in the whole order of th^ 

 UMBELLAT.E. .\ true pinnate leaf, has the partial leaves or 

 leaflets articulated to the common midrib, from wiience they are 

 spontaneously soluble at the peiiod of defoliation; such are the 

 leav^es of Fraxinus, liolmiia, AnorpJia^ Bignonia, he. On the 

 other hand, the pseudo-pinnate leaves are always! more or less 

 confluent at their cxfremitic-'t. 



