PARSLEY FAMILY. 341 



Fruit elongated, its ribs upwardly bristly; flowers white in compound 



umbels 6. Osmoeehiza. 



Oil-tubes oonspionous; flowers white; annuals or biennials. 

 Ribs armed with barbed or hooked bristles. 

 Fruit somewhat flattened dorsally; calyx-teeth obsolete; umbels 



compound 7. Daucus. 



Fruit flattened laterally ; calyx-teeth obvious ; umbels simple or nearly 



simple 8. Cauoalis. 



Ribs inconspicuous; fruit papillate-roughened; umbels irregularly com- 

 pound ; ai- or tri-chotomous branching annual . . 9. Apiastetjm. 

 B. Fruit not prickly, nor tuberculate, nor scaly (sometimes iiairy). 

 Leaves opposite; fruit ovate, turgid; ribs none; slender annuals. . . . 



]. BOWLESIA. 



Leaves alternate or in a radical tuft; perennials or biennials. 

 Leaves simple; stems creeping; umbels simple or proliferous. 



Leaves orbicular or peltate; oil- tubes none 2. Hydeocotyle. 



Leaves consisting of hollow cylindrical petioles; oil-tubes solitary. . . 



18. Ceantzia. 

 Leaves pinnately or ternately compound, or decompound; umbels 

 compound. 

 Fruit not flattened dorsally, sometimes somewhat laterally flattened; 

 ribs not winged. 

 Flowers white. 

 Oil-tubes none. 

 Fruit linear or elongated, }^ to 1 in. long . 6. Osmoeehiza. 



Fruit ovate, Hi lines long ... . .10. CONiUM. 



Oil-tubes solitary in the intervals. 

 Umbels subsessile in the forlcs and terminal on the branches; fruit 



less than 1 line long .12. Apium. 



Umbels terminal on the branches. 

 Leaves pinnate or bipinnate. 

 Leaflets serrate; plants of marshes or stream banks. 

 Ribs corky, but distinct. 

 Styles short ... . .... 13. Cicuta. 



Styles elongated 19. OEnanthe. 



Ribs confluent, forming a continuous corky covering . 



20. Bebtila. 

 Leaflets entire; ribs filiform ; plants of dry ground . . . 



15. Cahum. 

 Leaves triternately dissected; fruit less than I line long . 



14. AM.MI. 



Oil-tubes 2 or more, at least in some of the intervals. 



Leaves simply pinnate ; bracts and bractlets present 



17. SlUM. 

 Leaves 2 or 3 times ternate; bracts and bractlets mostly none. . 



16. PlMPINELLA. 



Flowers yellow. 

 Rather low plants ; leaves mostly radical; leaflets broad ... 



11. VELiEA. 



Tall leafy plants; leaves dissected into filiform segments 



21. FtENICULUM. 



Fruit flattened dorsally; the lateral ribs winged. 

 OU-tubes as long as the fruit. 

 Dorsal and intermediate ribs winged or very prominent; flowers 

 white; tall and leafy plants. 

 Leaves ternate, then pinnate; oil-tubes 1 to 3 in the intervals. . . . 



28. Angelica. 

 Leaves pinnate; oil-tubes solitary in the intervals 



22. Selinum. 

 Dorsal and intermediate ribs filiform. 



Acaulescent or short caulescent. 

 Wings corky-thickened; flowers commonly yellow; tall plants 



with large leaves 24. Leptot^nia. 



Wings thin; fiowers yellow, white or purple; low plants . , . . 



25. Peucedandm. 



