42 UMBELLIFER.E. 



17. HERACLEUM. Fl. with the outer pet. large in each umbel. 

 Fruit with one wing on each side, and 3 very fine dorsal ribs. 

 Vittae single, short, club-shaped. 



C. Fruit as long as, or one and a half times longer than, its 

 diameter. Umbels compound. 



a. Vittce none. 



18. CONIUM. General involucre of few leaves; partial of 3 short 

 ones, 011 one side. Fruit broadly ovate. Carpels with 5 

 waved or crenated ribs. 



b. Vittce single. 



4. CICUTA. General involucre none; partial of many leaves. 

 Fruit with 2 globose carpels, ribs broad and flattened. Oal. 

 teeth leafy, prominent above the ovary. 



5. PETROSELINUM. General involucre of few; partial of many 

 leaves. Fruit ovate. Carpels with 5 slender ribs. Fl. 

 yellow. 



6. HELOSCIADIUM. Partial involucre of many leaves. Carpels 

 with 5 prominent slender ribs. Fl. small, white. Cal. teeth 

 minute. 



12. ^THUSA. Partial involucre of 3, very long pendant, uni- 

 lateral leaves. Carpels with 5 broad, acutely keeled ribs. 

 Styles reflexed. 



c. Vittce 2 or more between the ribs, or interior. 

 10. PIMPINELLA. Partial and general involucres none. Styles 

 slender, divaricate or re-curved. Fruit ovate. Cal. teeth 

 obsolete. Fl. white. 



19. SMYRNIUM. Partial and general involucres none. Fruit of 

 2 nearly globose carpels, with 3 sharp dorsal ribs. Fl. 

 yellowish green. 



D. Fruit twice, or several times longer than its diameter. 

 Umbels compound. 



a. Vittce none. 



7. JSGOPODIUM. Involucres none. Cal. teeth obsolete. Carpels 

 with 5 slender ribs. 



21. ANTHRISCUS. Partia involucre of several leaves. Carpels 

 smooth, without ribs, narrowed below the beak. 



23. MYRRHIS. Partial involucre of several leaves. Carpels with 

 5 prominent acute ribs, which are hollow underneath. 



20. SCANDIX. Partial involucre of 5 7 leaves. Fruit linear, 

 beak very long. Carpels with 5 obtuse ribs. 



b. Vittce single. 



8. CARUM. General and partial involucres small, sometimes 

 none, or of one leaf. Cal. teeth obsolete. Carpels with 5 

 not prominent ribs. 



