670 FLORA. 



Carpels terete, or slightly flattened laterally. 43. Spermolepis. 

 Fruit with 4 strong bristly wings. 



Fruit dorsally flattened ; calyx-teeth obsolete. 48. Daucus. 

 Fruit laterally flattened ; calyx-teeth prominent. 



9. Torilis. 

 b. Fruit smooth, ribbed or winged, rarely pubescent. 



Fruit winged, at least on the lateral ribs, dorsally flattened. 



Plants acaulescent, or nearly so ; leaves bipinnate or dissected. 



44. Peucedanum. 

 Plants tall, leafy-stemmed. 



Leaves simply ternate or pinnate. 



Leaf-segments ovate-lanceolate to oblong. 



42. Oxypolis. 



Leaf-segments very broad. 45. Imperatoria. 



Leaves ternately or pinnately compound ; segments broad. 

 Segments ovate or oval, not cordate. 



Bracts of the involucels setaceous or none. 



38. Angelica. 

 Bracts of the involucels connate at base. 



39. Levisticum. 

 Segments large, cordate, pubescent. 47. Heracleum. 



Leaves 2-3-pinnately decompound ; segments narrow. 



37. Conioselinum. 

 Fruit winged or wingless, not flattened either dorsally or laterally. 



All its ribs winged. 40. Cymopterus. 



Ribs distinct, but not winged. 



Leaves finely dissected; segments narrow. 32. ^Ethusa. 

 Leaf-segments broad. 



Fruit with numerous oil-tubes between the ribs. 



34. Ligusticum. 

 Fruit with solitary oil-tubes between the ribs. 



35. Coelopleurunt. 

 Leaves entire, or with a few narrow segments. 30. Cynosciadium. 



Fruit laterally flattened. 



Fruit broader than long, the carpels globose, attached by a very nar- 

 row commissure. 10. Bifora. 

 Fruit linear or linear-oblong. 



Leaves 3-foliolate. 21. Deringa. 



Leaves decompound or finely dissected. 



Fruit long-beaked, smooth, ribless. 6. Anthriscus. 



Fruit short-beaked or beakless, ribbed. 5. Chaerophyllum. 

 Fruit ovoid or oval. 



Umbels opposite the leaves. 16. Apiunt. 



Umbels terminal or axillary. 



Leaves finely dissected into filiform segments. 



Ribs of the fruit equal, prominent. 29. Ptilimnium. 

 Lateral ribs much thickened. 16. Apium. 



Ribs filiform, inconspicuous. 22. Carum. 



Leaves pinnate or decompound; segments linear to ovate-oblong. 

 Plants acaulescent, or nearly so. 



Calyx-teeth obsolete; fruit nearly orbicular. 



12. Erigenia. 

 Calyx-teeth prominent ; fruit oblong. 



14. Musineon. 

 Plants leafy-stemmed. 



Oil-tubes of the fruit none. 



Leaves biternate with broad segments. 



25. jEgopodium. 

 Leaves decompound into small pinnatifid segments. 



13. Contum. 

 Oil-tubes solitary between the ribs; leaves pinnate. 



20. Cicuta. 

 Oil-tubes numerous. 



Leaves pinnately compound ; segments linear. 



26. Eulophus. 

 Leaves pinnate; the segments sometimes pinnatifid. 



Tall native marsh perennials. 



Oil-tubes 1-3 in the intervals between the 

 prominent ribs. 27. Stum. 



