152 UMBELLIFER^E, [HYDROCOTYLE. 



** Seed flat in front or nearly so. (Fruit short in all.) 

 t Petals white, entire, with an incurved point. 

 Ridges slender ; vittse 1-3. Carpophore entire or 2-fid ............. 9. Apium. 



Ridges stout, sharp; vittae numerous ................................ 23. Crithmum. 



ft Petals yellow, entire or with an incurved point. 

 Ridges slender ; carpophore 2-partite .................................... 10. Carum. 



Dioecious. Vittee within the stout ridges ................................. 8. Trinia. 



Bracteoles 0. Vittae solitary ......................................... 22. Fceniculum. 



Bracteoles many. Vittae 2-3 ................................................ 27. Meum. 



Bracteoles many. Vittse many ............................................. 26. Silaus. 



ttt Petals white, obcordate, notched or 2-lobed. 



H Calyx-teeth distinct. 

 Fruit didymous ; ridges flat ; vittae solitary ............................. 12. Cicuta. 



Fruit subterete ; ridges thick ; vittae 1-2 ............................... 21. Seseli. 



Fruit globose ; ridges obscure ; vittae ........................ 22*. Coriandrum. 



HH Calyx-teeth obscure or 0. 

 Fruit covered with hooked bristles ...................................... 33. Daucua. 



Bracts and bracteoles linear ................................................ 10. Carum. 



Bracteoles 0. Ridges slender ; vittse ; styles slender ...14. ^Egopodium. 

 Bracts few or 0, bracteoles many. Ridges obtuse ................ 24. (Enanthe. 



Bracts and bracteoles unilateral, deflexed .............................. 25. ^Ethusa. 



Bracts few or 0, bracteoles many. Ridges almost winged ...28. Ligusticum. 

 ft. Fruit much dorsally compressed, broadly winged. 



* Lateral imngs of the opposite carpels closely contiguous. 

 Petals white, notched. Wings thin, vittae club-shaped ...... 31. Heracleum. 



Petals various. Wings thin, vittse long ........................ 30. Peucedanum. 



Petals white. Wings with a thickened border .................. 32. Tordylium . 



** Lateral vnngs of opposite carpels trith a space between them. 

 Petals white, notched. Wings thin ................................. 29. Angelica. 



1. HYDROCOT'YIiE, L. WHITE-ROT, 

 Small perennial herbs, often creeping. Leaves entire, lobed, or 3-5- 

 foliolate. Umbels usually simple ; bracts few or 0. Calyx-teeth 5 or obso- 

 lete. Petals not inflexed, valvate or imbricate in bud. Fruit much late- 

 rally compressed ; commissure narrow carpophore undivided 2-fid or ; 

 carpels nearly orbicular, with 1-5 ridges on each side ; vittae or slender ; 

 styles filiform, on the flattened disk. DISTRIB. Temp, and trop. ; species 

 70. ETYM. iiowp and KOTV\I], from the cupped peltate leaf. 



1. H. vulga'ris, L. ; leaves orbicular peltate crenate, petiole pilose. 

 Marshes, bogs, &c., ascending to 1,000 ft. in the Lake district ; fl. May -Aug. 

 Stem filiform, white, creeping, rarely floating. Leaves ^-2 in. diam., 1 or 

 4 at the nodes ; petioles 2-6 in. Umbels axillary, shortly peduncled. Flowers 

 small, capitate, pinkish-green ; bracts minute, triangular, concave. Fruit 

 & in. diam. ; carpels covered with resinous points, with 2 ridges on each 

 side. DISTRIB. Europe, N. Africa. 



2. ERYNGIUM, L. ERYNOO. 



Rigid, branched, often glaucous, perennial herbs. Leaves spinous-toothed, 

 lobed or cut. Flowers sessile, in very dense bracteolate heads, surrounded 

 at the base by a whorl of rigid bracts. Calyx-tube scaly ; teeth rigid, 



