MACLOSKIE: UMBELLIFER/E. 621 



c2. Seeds flat on the commissures ; raphe often protruding, rarely receding. 



d. Lateral ribs and 3 dorsal ribs subsimilar. Seeds semi-circular in cross-section, with 



broad endosperm. 



c. Ribs of fruit slightly protruding. Mericarps hanging together by a narrow com- 

 missure. Only vallecular oil-tubes, or none. No crystal-glands in pericarp. 

 Lower leaves divided, sheathing-petioled. Flowers white. 

 /. Mericarps with 5 equal ribs ; oil-tubes vallecular, or more or none. Calyx 

 teeth none or minute. Petals ovate-acute, entire, apex sometimes inflexed. 

 Leaves pinnate, or further cut. Involucres varying. 



12. Apium, p. 639. 



/2. Fruit long oval or mericarps cylindro-concave, smooth. Oil-tubes one in 

 each furrow. Petals clawed, cleft, the lobes unequal, apex sessile in the 

 deep notch. Terminal and lateral umbels. Calyx-teeth obsolete ; styles 

 short. Bracts and bracteoles pinnate. 



13. Ammi, p. 641. 



fT,. Fruit cordate-ovoid to didymous or shorter. Oil-tubes many, fine. Calyx- 

 teeth long, persisting. Petals apically inflexed. Styles short. Leafy- 

 stemmed marsh-plants. Bracts and bracteoles many, small, persistent. 

 Leaves mostly once-pinnate. 14. Slum, p. 641. 



2, Ribs of fruit strong, and often wing-like ; the side-ribs broadening the commis- 



sural face of the mericarps ; the carinal and sutural ribs subequal. 

 f. Fruit short-ovoid or obconic. Stylopodium broad, obtuse. Marginal ribs 

 thick and broad, not winged. Mericarps dorsally broad-round, not com- 

 pressed, smooth. Oil-tubes I in each furrow. Carpophore obsolete. 

 Creeping plants with simple umbels and terete leaves. Flowers white. 



1 5 . Lilaopsis ( Crantzid), p. 64 1 . 



/2. Fruit ovoid-cylindrical, dorsally compressed, smooth. Mericarps some- 

 times with small wings. Lateral ribs imbricating, strong ; the other ribs 

 mostly small. Oil-tubes 4 vallecular, 2 commissural, large. Flowers 

 green-yellow. 1 6. Fceniculum, p. 642. 



/3- Fruit ovoid-cylindrical, not dorsally compressed, smooth. Ribs subequal, 

 all broad-winged. Seeds with broad, often pentagonal cross-section. 

 Petals obcordate, notched, whitish. Calyx teeth none or minute. Sev- 

 eral vallecular oil-tubes or minute. Leaves ternately compound. 

 Bracts and bracteoles several, narrow, some divided. 



17. Ligusticum, p. 642. 



^3. Side-ribs of fruit much broader than the 3, often slight, dorsal ribs ; forming 

 small double wing-like processes of the paired mericarps. Seeds small in 

 cross-section. Bracts and bracteoles mostly none. Leaves pinnate. 

 Flowers yellow. 18. Pastinaca, p. 642. 



bz. Secondary ribs over the oil-tubes, usually exceeding the primary ribs and armed by barb- 

 less or barbed spines. Bracts pinnate ; bracteoles entire or toothed. Flowers chiefly 

 white. Leaves pinnately decompound. 19. Daiicus, p. 643. 



