UMBELLIFER^:. 245 



<----*- Fruit with very thick and corky lateral ribs, filiform 

 dorsal and intermediate ones, stylopodium depressed, oil-tubes soli- 

 tary. 



17. Orogenia. Carpel flattened dorsally, lateral wings very corky thick- 

 ened, oil-tubes very small 3 in the intervals, 2-4 on the commissure. 



18. Crantzia. Seed terete, carpel with filiform dorsal and intermediate 

 ribs lateral wing very thick and corky next the commissure ; oil- 

 tubes 2 on the commissure. 



19. (Enanthe. Carpel with broad obtuse corky ribs the lateral ones 

 largest, oil-tubes 2 on the commissure; seed semi-terete, sulcate be- 

 neath each oil-tube. 



* * * Fruit flattened laterally. 

 H- Fruit prickly or with tuberculate scales, the ribs obsolete. 



20. Eryngium. Calyx-lobes very prominent, rigid, often spinose, per- 

 sistent. 



21. Sanicnla. Calyx-lobes somewhat foliaceous fruit sub-globose densely 

 covered with hooked prickles, or tuberculate 



-- -- Fruit neither prickly nor scaly. 

 M- Carpels flattened dorsally. 



= Fruit with plane seed-face, numerous oil-tubes, depressed stylo- 

 podium and filiform ribs 



22. Pimpinella. Calyx-teeth obsolete, carpel with equal slender ribs. 



= = Fruit 'with concave seed face, numerous oil-tubes and fili- 

 form ribs. 



23. Museninm. Calyx-teeth prominent, stylopodium depressed; oil-tubes 

 usually 3 in the intervals, unequal, 2-4 on the commissure. 



24. Enlophus. Calyx- teeth prominent, stylopodium conical; oil-tubes 1-5 

 in the intervals, 4-8 on the commissure. 



25. Buplenrum. Calyx teeth obsolete : fruit oblong, with rather bread 

 commissure. 



+> -M- Carpels terete or slightly flattened laterally. 



= Fruit linear-oblong, with concave seed-face and conical stylopo- 

 dium. 



26. Leibergia. Fruit flattened laterally, linear, beaked stylopodium 

 wanting. 



27. Osmorhiza. Calyx-tube obsolete, fruit acute at both ends, oil-tubes 

 obsolete in mature fruit. 



28. Glycosma. Calyx-teeth obsolete : fruit linear to linear-oblong, not 

 attenuate at base. 



= = Fruit with concave seed-face depressed stylopodium, and 

 numerous oil-tubes. 



29. Yalaea. Carpel somewhat flattened laterally with prominent equal 

 filiform ribs. 



== = == Fruit with plane seed-face and depressed stylopodium. 

 a. Oil-tubes numerous, ribs broad and corky. 



