476 CONTEIBUTIONS FROM THE NATIONAL HERBAEIUM. 



Stylopod ium wanting ; 

 calyx teeth minute 

 or obsolete; dorsal 



ribs filiform 19. Cogswellia (p. 484). 



Stylopod ium present; 

 calyx teeth evi- 

 dent; dorsal ribs 



sharp or winged... 25. Cynomarathrum (p. 485). 

 Plants caulescent, branching. 

 Flowers white; dorsal 



ribs prominent 13. Angelica (p. 481). 



Flowers yellow; dorsal 



ribsfilifoi-m 23. Pastinaca (p. 485). • 



Oil tubes more than one in the inter- 

 vals between the ribs. (See 

 also Aulospermum.) 

 Plants caulescent, branching. 



Leaves temately or pinnately 



compound 13. Angelica (p. 481). 



Leaves several times com- 

 pound 12. CONIOSELINUM (p. 480). 



Plants acaulescent or nearly so. 

 Lateral wings of the fruit 



thin 19. Cogswellia (p. 484). 



Lateral wings of the fruit 

 thickened . 

 Dorsal ribs very promi- 

 nent or slightly 



winged 17. Pseudocymopterus (p. 482). 



Dorsal ribs filifonn 16. Cymopterus (p. 482). 



Fruit not strongly flattened dorsally, 

 usually more or less laterally com- 

 pressed . 

 Oil tubes more than one in the inter- 

 vals between the ribs. 

 Stylopod ium conical. 



Fruit spherical, with globose 

 carpels and very slen- 

 der inconspicuous ribs. 9. Berula (p. 479). 

 Fruit ovoid or oblong, with 



prominent equal ribs. .10. Ligusticum (p. 480). 

 Stylopod ium flat or wanting. 



Seed face sulcate or concave. .15. Aulospermum (p. 481). 

 Seed face plane or but slight- 

 ly concave. 

 Leaves pinnate, Tifith 

 short crowded seg- 

 ments; flowers pur- 

 plish 14. Phellopterus (p. 481). 



Leaves temate-p innate, 

 with distant seg- 

 ments; flowers yel- 

 low 26. Pteryxia (p. 485). 



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