UMBELLIFERjE. 



151 



SERIES 3. DIPLOZYGTEJE. Umbels compound (sometimes simple in Caucalis) ; 



secondary ridges more distinct than the primary (see also 22*. Coriandrum), 



spinous in the British genera. 



Bracts pinnatifid or laciniate. Seed flat in front 33. Daucus. 



Bracts entire or 0. Seed grooved in front 34. Caucalis. 



ARTIFICIAL KEY TO THE GENERA. 



I. Leaves undivided. 



Creeping. Leaves peltate 1. Hydrocotyle. 



Erect. Leaves linear 7. Bupleurum. 



II. Leaves palmate, or simply 3-nately divided. 



Umbels subglobose. Fruit prickly. Leaves palmate 3. Sanicula. 



Umbels in dense heads. Fruit scaly. Leaves spiny .2. Eryngium. 



Umbels many-rayed. Leaves 3-foliolate 30. Peucedanum. 



Bracts large, coloured. Leaves palmate 2*. Astrantia. 



III. Leaves simply pinnate, rarely compound at the base. 

 a . Fruit dorsally much compressed, winged. 



Border of wings very thick. Petals pink 32. Tordylium. 



Border of wings not thickened. Petals white 31. Heracleum. 



/3. Fruit not much compressed, terete or didymous. 



* Fruit spiny. Seed grooved in front 34. Caucalis. 



** Fruit glabrous. Seed flat or nearly so in front, 

 t Petals entire. 



Carpophore 2-partite 



Carpophore entire or 2-fid 



ft Petals notched or 2-lobed. 

 Ridges of fruit slender ; vittse clavate, solitary, short 11. Sison. 



....15. Pimpinella. 

 13. Sium. 



34. Caucalis. 



....20. Anthriscus. 



Ridges of fruit prominent ; vittse several, long 



Ridges of fruit slender ; vittae several, long. . . 



IV. Leaves 2-3- pinnate or 2-3- ternate. 



a- Fruit terete or angled, not much dorsally comj 

 * Seed grooved in front, or with involute margins, 

 f* Fruit muricate or prickly. 



Ridges of fruit elevated, with strong spines 



Ridges obscure 



*H* Fruit smooth, glabrous, rarely pubescent. 



J Fruit short, ovoid, subglobose or didymous. 



Flowers white. Ridges filiform ; vittse solitary 4. Physospermum. 



Flowers white. Ridges thick, waved ; vittse several 5. Coniutn. 



Flowers yellow. Ridges stout, even ; vittse several 6. Smyrnium. 



Jt Fruit narroiv, but not beaked. Flowers white. 



Ridges slender ; vittse numerous 16. Conopodium. 



Ridges sharp ; vittse 17. Myrrhis. 



Ridges obtuse ; vittse solitary : 19. Chserophyllum. 



+++. Fruit narrow, beaked. Flowers white. 



Beak long ; ridges obtuse .... 

 i i 



Beak moderate ; ridges obscure 



18. Scandix. 



20. Anthriscus. 



