CALYCIFLOR.E 26i 



oil-glands or vittae. These features are important in 

 classification. Sometimes the mericarps are winged. 



If the division or suture between the mericarps is 

 in the longest diameter of the cremocarp the fruit is 

 dorsally compressed, and laterally when the suture is 

 in the shortest diameter. 



The disk secretes honey, which is freely exposed, 

 and the flowers are much visited by insects, especially 

 flies. The anthers ripen first. 



The fruit is a schizocarp, which splits down the 

 septum between the carpels. Some are winged and 

 dispersed by the wind as in Hogweed, or hooked as 

 in Daucus and dispersed by animals. 



The group includes many useful plants. 



Marsh Pennywort (Hydvocotyle vulgaris). 



The English name is a clue to one of the most 

 distinctive features of this plant, the rounded leaves 

 like a penny as in the case of Navel-wort. Indeed 

 the plant shows itself mainly by its leaves, the flowers, 

 not always produced, being buried below amongst the 

 leaves. The first Latin or Greek name also indicates 

 its aquatic propensities, and refers again to the cup- 

 like leaves, though as a rule they are flatter than in 

 the Navelwort. But the peltate leaves distinguish 

 it from all other Umbellifers. 



The plant is also called White Rot, apparently 

 because of the white, creeping stems, like the creeping 

 hyphae of a fungus. 



