244 UMBELLIFERvE. 



4. Angelica. Carpels with strone; ribs, laterals forming a distinct dou- 

 ble-winged margin to the fruit, oil-tubes' one to several in the inter- 

 vals, 2-10 on the commissure. 



5. Selinum. Carpels with prominent winged ribs, the lateral ones 

 usually the broadest ; oil-tubes conspicuous, 2-4on the commissure; seed 



suicate beneath the oil-tubes. 



+- -*- Caulescent branching plants, with solitary oil-tubes, conical 

 stylopodium, filiform or stronger dorsal and intermediate ribs and 

 white flowers. 



«. Heracleum. Carpels with dorsal and intermediate ribs filiform ; the 

 broad lateral wings contiguous to those of the other carpel, strongly 

 nerved towards the outer margin. 



■*-.-*- ■*- Short caulescent or acaulescent with solitary or numer- 

 ous oil-tubes, no stylopodium, filiform dorsal and intermediate ribs. 



++ Lateral wings coherent till maturity. 



7. Pastinaca Calyx-teeth obsolete: fruit oval, very much flattened, 

 glabrous. 



8. Coloptera. Carpel with dorsal and intermediate ribs filiform or 

 winged and approximate : lateral wings broad, very thick and corky : 

 oil-tubes small, 4-8 in the intervals, 8-14 on the commissure 



9. Leptotsenia. Carpel with dorsal and intermediate ribs filiform or 

 obsolete, the lateral wings with thick corky margin that is coherent - 

 with the margin of the opposite one till maturity : oil-tubes 3-6 in the 

 intervals, 4-6 on the commisure. (Sometimes obsolete.) 



10. Peucedanum. Carpel with dorsal and intermediate ribs filiform 

 approximate, lateral wings broad and thin: oil-tubes 1-8 in the inter- 

 vals, 2-10 on the commissure. 



++ ++ Carpel * not coherent. 



11. Pseudocymopterus. Carpel with dorsal and intermediate ribs promi- 

 nent and acute; lateral wings rather broad and thickish, oil-tubes 1-4 

 in the intervals, 2-6 on the commissure. 



* * Fruit but slightly if at all flattened either way. 



+- Fruit with all the ribs conspicuously winged, stylopodium de- 

 pressed or wanting. 



12. Cymopterus. Carpel somewhat flattened dorsally, with mostly 5 

 broad thin equal wings, the lateral wings distinct. 



13. Phellopterus. Carpel somewhat flattened dorsally with 5 equal 

 broad and corky-thickened wings, the wings distinct. 



14. Thaspium. Carpels with 8 or 4 or all the ribs strongly winged : sty- 

 lopodium wanting. 



+- ■*- Fruit with all the ribs prominent and equal acute or slightly 

 winged stylopodium, conical oil-tubes numerous. 



15. Ligusticum. Oil-tubes 2-6 in the intervals, 6-10 on the commissure. 



+- +- ■«- Fruit with broad and equal corky ribs, stylopodium de- 

 pressed, oil-tubes solitary. 



16. Coelopleurum. Carpel with very thick and prominent corky ribs. 



