l86. UMBELLIFERAE 



407 



38. Ribs of the fruit confluent ; furrows hardly perceptible. Fruit ovoid, 



glabrous or hairy. Oil-channels numerous. Albumen rolled inwards. 

 Calyx not toothed. Petals yellow. Leaf-segments linear. — Species 3. 



North-west Africa Cachrys L. 



Ribs of the fruit separated ; furrows distinctly visible. Calyx toothed. 39 



39. Ribs of the fruit broad and rounded, roll-shaped ; furrows very narrow, 



each with several oil-channels. Fruit slightly or not compressed, 

 hairy. Albumen curved. Petals white. Leaf-segments broad. — 



Species 2. North-west Africa Magydaris Koch 



Ribs of the fruit slender, more or less thread-shaped ; furrows not very 

 narrow. Albumen rolled inwards. Leaf-segments narrow ... 40 



40. Fruit covered with bhsters, broad-cordate, laterally much compressed. Oil- 



channels I — 3 to each furrow. Seeds loosely enclosed by the pericarp. 

 Petals white. Leaf-segments oblong. — Species i. East Africa. 



Trachydium Link 



Fruit smooth or covered with tubercles or hairs. Oil-channels numerous. 



Petals yellow. Leaf-segments linear. — Species 3. North-west Africa. 



Used medicinally Hippomarathrum Lindl. 



41. Oil-channels replaced by a continuous oil-layer. Fruit ovoid. Pericarp 



thick. Ribs thick, wavy or crenate. Albumen curved. Calyx not 

 toothed. Petals white, shortly inflexed. — Species 2. North Africa, 

 Abyssinia, and South Africa. Poisonous and used medicinally. " Hem- 

 lock " Conium L. 



Oil-channels separated. Fruit cordate. Pericarp thin. Ribs thin. 

 Petals long inflexed 42 



42. Oil-channels solitary in the furrows. Albumen curved. Calyx toothed- 



Petals white. — Species i. North Africa. Physosperinuin Cuss. 

 Oil-channels 2 or more in each furrow. Root tuberous 43 



43. Oil-channels 2 — 3 in each furrow. Albumen curved. Calyx not toothed. 



Petals white. Involucre wanting. — Species i. North-east Africa 



(Cyrenaica). (Under Conopodium Koch) Scaligeria DC. 



Oil-channels numerous. Albumen rolled inwards. Petals yellow. — 

 Species 2. North Africa. 1 hey yield vegetables and medicaments. 



Smyrnium L. 



44. (23.) Marginal ribs of the mericarps much more prominent than the dorsal 



and more or less distinctly winged. Mericarps and seeds much com- 

 pressed from front to back. [Tribe PEUCEDANEAE.] .... 45 

 Marginal ribs of the mericarps similar to the dorsal. Mericarps and seeds 

 slightly or not compressed. [Tribe AMMINEAE.] 57 



45. Nerves (vascular bundles) of the marginal ribs next to the edge of the 



mericarps, distant from the seed 46 



Nerves of the marginal ribs situated at their base near the seed. . . 52 



46. Marginal wings of the mericarps much thickened at the edge. ... 47 

 Marginal wings of the mericarps slightly or not thickened at the edge or 



not distinctly developed 5^ 



