ANGipSPERM^, DICOTYLEDONES. 



789 



fig. 442^). The calyx, corolla, and androecium are 4-merous in Cornacete, 5-nierous 

 in Umbelliferse and Araliacese (see figs. 442 ^ and 442 ^ and p. 289, fig. 283 *). 

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



Fig. 442.— Umbellales. 



1 Hemdeum Sphondylium (Family Umbelliferae), flowering plant. 2 single flower, a Fruit. « Longitudinal section tlirough 

 the flower of Enjngmm maritimum (Family Umbellifera;). s Hydrocotyle vulgaris (Family Umbellifene), entire plant, 

 e Conius mas f Familv Cornaceje). inflorescence. ' Longitudinal section tlirough a flower, s Fruit. 1 reduced ; -, s, *, *, ^ ', 



Cornus mas (Family Cornacese), inflorescence. ' Longitudinal 1 

 and 8 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 famihes of Araliacese and Cornacese, have been 



