276 Umbelliferae 



anthers versatile. Ovary inferior, 2-celled ; styles 2, 

 filiform, distinct, often borne on a conic or depressed 

 stylopodium ; ovules 1 in each cell, pendulous, anatrop- 

 ous. Fruit dry, composed of 2 carpels, separating at 

 maturity along the plane of their contiguous faces (com- 

 missure); either flattened laterally (at right angles to 

 the commissure), or dorsally (parallel with the commis- 

 sure), or nearly terete. Carpels after parting supported 

 on a slender axis (carpophore), more or less ribbed or 

 winged. Pericarp membranous or corky-thickened, usu- 

 ally containing oil-tubes between the ribs and on the 

 commissural side. Seeds usually adnate to the pericarp, 

 their inner faces flat or concave ; endosperm cartilagi- 

 nous ; embryo small. 



Flowers in dense, usually rather spiny heads. 4. ERYNGIUM. 



Flowers umbellate. 



Fruit covered with hooked bristles. 3. SANICULA. 



Fruit with bristles only on the ribs. 



Bristles barbed at tip. 22. DAUCUS. 



Bristles short, neither hooked nor barbed. 5. WASHINGTONIA. 



Bristles hooked. 6. CAUCALIS. 



Fruit not bristly. 



Oil-tubes obsolete or obscure. 



Leaves decompound. 8. CONIUM. 



Leaves simple. 



Fruit strongly flattened laterally. 1. HYDKOCOTYLE. 



Fruit not strongly flattened laterally. 2. BOWLESIA. 



Oil-tubes distinct. 



Fruit strongly flattened dorsally. 

 Flowers white. 



Caulescent. 18. SPHENOSCIADIUM. 



Accaulescent or nearly so. 19. LOMATIUM. 



Flowers yellow. 



Plants leafy-stemmed. 21. PASTINACA. 



Plants with mostly basal leaves. 



Leaflets large, sharply toothed. 20. EUBYPTERA. 



Leaflets narrow or small, not sharply toothed. 



19. LOMATIUM. 



Fruit not strongly flattened dorsally, usually flattened laterally. 

 Oil- tubes solitary in the intervals. 

 Stylopodium conical. 



Flowers yellow. 17. FOENICULUM 



Flowers white. 



Leaflets, at least the upper, linear or filiform. 



13. CABUM. 

 Leaflets broader. 12. CICUTA. 



