GENERA OR FAMILIES. 157 



(114) Sium — fruit ovoid or globose; carpels with live filiform 



obtuse equal ridges ; vittae three or more between the 

 ribs ; calyx of five small teeth. 



(115) Pimpinella — fruit ovate; carpels with five filiform equal 



ridges; vittae three or more between the slender ribs; 

 calyx obsolete. 



nil Leaves simple. 



(1 IG) BupletLnim — fruit ovate-oblong ; carpels with equal 

 winged, or filiform sharp, or obsolete ridges. 



§§ Fruit ovate or elliptical, rounded, or slightly com- 

 pressed dorsally. 



II YittcB (oftlie carpels) single hetween the rihs. 



(117) CEnanthe — fruit ovoid-cylindrical, crowned with the long 



erect styles ; carpels corky, with five blunt ridges. 



(118) iEthusa — fruit shortly ovoid, crowned with the reflexed 



styles ; carpels witli five thick acutely-keeled edges. 



III! Vittcd (of the carpels) two or more between the ribs. 



(a) Seeds without vittce, cohering with the carpels. 



(119) Meum — fruit elliptical, terete; carpels with five sharp 



somewhat winged ridges. 



(b) Seeds with many vittce, loose from the carpels. 



(120) Critlimuni — fruit elliptical, terete; carpels with five sharp 



elevated slightly-winged ridges. 



§§§ Fruit much compressed dorsally. 

 II Petals entire. 



(121) Pastinaca — fruit with a flat dilated margin; carpels with 



three slender dorsal ridges, and two distant lateral ones 

 near the edge ; vittae linear, solitary. 



(122) Heracleum — fruit with margin and ridges as in Pastinaca; 



vittsB short, club-shaped. 



