134 



NATURAL RI8T0BY OF PLANTS. 



Arracacia iias long been referred to Oonium. It has nearly the 



flower with or without dis- 



pods are conical, ordinarily 

 rather elongate; the inferior 

 margin is dilated and un- 

 dulated. The fruit is much 

 more elongate than that of 

 Coniwm, more or less com- 

 pressed perpendicular to 

 the partition, and pointed 

 at the summit. The ridges 

 are nearly equal and but 

 little prominent ; the mar- 

 ginal or lateral rather more than the others. In each furrow are 

 several unequal vittse or one wide one filled with an aromatic 



Fig. 146. Flower (w). 



Oonium maculatum. 



Fig. 147. Fruit (L). 



Fig. 148. Trans, sect, of fruit. 



substance. The margin of the seed is more or less, sometimes very 

 much, incurved or involute. They are perennial herbs, with stock 

 sometimes tuberous, pinnate or decompound leaves, compound 

 umbels with involucels, with or without involucres. All are 



