UMBELLIFKKAE. ^M 



Flowers white, greenish or pink. 



Fruit, or its beak, bristly, papillose or tuberculate. 



Leaves digitately 3-7-parted or lobed. 2. Sanicula. 

 Leaves pinnately or ternately decompound or dissected. 

 Fruit linear, ribbed, long-attenuate at the base. 



5. Washingto7iia. 

 Fruit with 4 strong, bristly wings. 



25. Daucus. 

 Fruit smooth, ribbed or winged, rarely pubescent. 



Fruit winged, at least on the lateral ribs, dorsally flat- 

 tened. 

 Leaves simply ternate or pinnate. 22. Oxi/polis. 

 Leaves ternately or pinnately compound; segments 

 broad. 

 Segments ovate or oval, not cordate. 



21, Angelica. 

 Segments large; cordate, pubescent. 



24. Heracleum. 

 Fruit winged or wingless, not flattened either dorsally or 



laterally. 18. Aethusa. 



Fruit laterally flattened. 



Fruit linear or linear-oblong. 



Leaves 3-foliolate. 11. Deringa. 



Leaves decompound or finely dissected. 



4. Chaerophyllum. 

 Fruit ovoid or oval. 



Leaves finely dissected into filiform segments. 

 Ribs of the fruit equal, prominent. 



17. Ptilimnium. 

 Ribs filiform, inconspicuous. 



12. Carum. 

 Leaves pinnate or decompound; segments linear 

 to ovate-oblong. 

 Oil-tubes of the fruit none. 



Leaves biternate with broad segments. 



15. Aegopodiwn. 

 Leaves decompound into small, pinnati- 



fid segments. 7. Conium. 



Oil-tubes solitary between the ribs ; leaves 



pinnate. 10. Cicuta. 



Oil-tubes numerous. 



Tall, native marsh perennials. 



16. Sium. 

 Introduced plant of dry ground. 



14. Pimpinella. 

 Flowers yellow or purple. 



Fruit dorsally flattened. 23. Pastinaca. 



Fruit not flattened; ribs, or some of them, winged. 



20. thaspium. 

 Fruit laterally flattened; leaves decompound (except Zizia). 

 Leaf -segments oval or ovate, entire. 13. Taevidia. 

 Leaf-segments crenate, lobed or incised. 



Leaf-segments broad, crenate or dentate. 



9. Zizia. 

 Leaf-segments filiform; fruit prominently ribbed. 



19. Foeniculum. 



1. HYDROCOTYLE L. Water Pennywort. 

 Leaves nearly orbicular, peltate. 



Umbels simple, rarely proliferous; pedicels slender. 



1. H. umhellata. 



