164 PBACTIOAL BOTANY. 



309. Fruit ovate-globose. Carpels with 5, sharply- 

 keeled ridges, and with single vittse in the intervals. In- 

 volucels 1-sided, drooping, longer than the umbellets. 

 Leaves twice- to thrice-ternate ; leaflets pinnately divided. 

 Calyx-teeth obsolete. .Slthusa Cynapimn, L. 



Fruit elliptical or ovoid 310 



310. Flowers white. Leaflets broadly ovate or rhombic- 

 ovate, dentate. Involucre many-bracted. Calyx-teeth small, 

 or minute. Iiiguisticum. 



Flowers yellow, or sometimes dark purple. In- 

 volucre none. Invoiucels few-bracted. Calyx-teeth obsolete, 

 or short. Thaspium. 



311. (290.) Inner face of the seed deeply hollowed out 

 in the middle. Fruit twin, a double sphere. The carpels 

 nearly kidney-form. Plant low, flowering early. 



Erigenia bulbosa, Kutt. 



Inner face of the seed deeply furrowed lengthwise. 



Calyx-teeth obsolete 312 



313. Ribs bristly, the bristles pointing upward. Fruit 

 linear-club-shaped, tapering below. Calyx-teeth obsolete. 



Osmorrhiza. 

 Ribs not bristly 313 



313. Fruit ovate or ovoid 314 



Fruit linear-oblong, narrowed at the apex. ' Ribs 

 broad. Stems spreading, 6-18 inches long, somewhat pubes- 

 cent. Calyx-teeth obsolete. 



Chserophyllum procumbens, Lam. 



314. Ribs prominent, undulate-crenulate. Involucre and 

 invoiucels 3- to 5-bracted. Leaflets lanceolate, pinnatifid. 

 Calyx-teeth obsolete. Conium maculatum, L. 



Ribs almost none. Invoiucels short and bristle- 

 form. Fruit somewhat twin. Leaflets narrowly linear. 

 Root .a cluster of small tubers. 



Eulophus Americanus, Nutt. 



315. (284.) Calyx 2-cIeft, half superior. Style 3- to 6- 

 cleft or parted. Fleshy herb, prostrate, very smooth. Leaves 



