ANGIOSPERM^, DICOTYLEDONES. 



789 



fig. 442*). The calyx, corolla, and androecium are 4-merous in Cornaceae, 5-merous 

 in Umbellifera} and Araliaceje (see figs. 442 ^ and 442 8, ^nd p. 289, fig. 283*). 

 The Umbellales belong chiefly to the North Temperate Zone, but the Araliacese are 



Fig. 442.— Umbellales. 



1 Beradenm Sphondylium (Family Umbellifei,x'), flowering plant. 2 Single flower, s Fruit. * Longitudinal section through 

 the flower of Eryngium maritimum (Family Vmhelliferie). s Hydrocotyle vtdgaris (Family I'mbellifera!), entire plant. 

 « Coraus mas (Family Cornaueie). inflorescence. 'Longitudinal section through a flower. "Fruit, 'reduced; -,',^,^,',', 

 and 8 magnified. (After Baillon.) 



also represented by a number of species in the Tropics. Several of the Umbelliferse 

 are natives of the arctic area of vegetation and of alpine regions. Gaya simplex 

 occurs in the Central Alps as high as 2600 metres above the sea-level. Fossil 

 remains, belonging chiefly to the families of Araliaceee and Cornaceffi, have been 



