UMBELLIFER^. 



93 



mericarp. The latter is much compressed from front to back, and 

 has four dorsal secondary ridges much thicker and more prominent 

 than the primary. The dorsal are like cord; the marginal, much 



Thapsia gmrganica. 



Fig. 76. Trans, sect, of fruit ("0- 



more flattened, are thick and divided into irregular teeth at the 

 margin. Each covers a wide vitta. In Monizia, the marginal teeth 

 are found only in the upper part and are less prominent (fig. 77, 78). 



Melanoselinum (^Monizia) edule. 



Fig. 78. Trans, sect, of mericarp (|). 



Fig. 77. Fruit. 



Still less SO are they in Tornabenia, perennial herbaceous species 

 growing only at Cape Verd, the fruit of which is shorter but its 

 fundamental organization the same. 



II. ECHINOPHORA SERIES. 



We know that in the Carrots the flowers may be in part unisexual 

 and that the umbellule may be terminated by a central flower, often 



