ANGIOSPERMiE, DICOTYLEDONES. 



789 



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

 in Umbelliferae and AraliaceBS (see figs. 442 ^ and 442 ^ and p. 289, fig. 283 *). 

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



rig. 442.— Umbellales. 



1 Eemdeum Sphondylium (Family Umbelliferae), flowering plant. 2 Single flower. ' Fruit. * Longitudinal section through 

 the flower of Eryngium maritimum (Family TJmbelliferje). 5 Hydrocotyle vulgaris (Family Umbelliferae), entire plant. 

 * Cornits mas (Family Cornaceae), inflorescence. » Longitudinal section through a flower. "Fruit. 1 reduced; ',',*,',', ^, 

 and « magnified. (After Baillon.) 



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

 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 Araliaceas and Cornacese, have been 



